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C Circuit Lab Practice SciOly

Total questions: 100

Worksheet time: 1hrs 7mins

Name
Class
Date
1.

The dashed lines with arrows in the image represent the direction of the magnetic flux (Φ) within the core. If the current in the left coil is flowing downwards on the visible side, into the page at the top and out of the page at the bottom, which rule can be used to determine the direction of the magnetic flux?

a)

Left-Hand Rule for Motors

b)

Right-Hand Rule for Solenoids

c)

Kirchhoff's Voltage Law

d)

Ampere's Law

e)

Fleming's Left-Hand Rule

2.

Three resistors with values of R1, R2, and R3 are connected in series. Which of the following expresses the total resistance, Rt, of the three resistors?

a)

Rt = R1 + R2 + R3

b)

Rt = (1/R1 + 1/R2 + 1/R3)

c)

Rt = R1 = R2 = R3

d)

Rt = (1/R1 + 1/R2 + 1/R3) Δ 1

3.

True or False: When the Wheatstone bridge is balanced, the galvanometer (VG) measures a non-zero current.

a)

True

b)

False

4.

When the switch in the circuit is open, which of the following bulbs will NOT light up?

a)

Bulbs A and B

b)

Bulb C

c)

Bulbs D and E

d)

All bulbs will light up.

5.

Assuming all other switches remain in their current positions, what will be the state of the light bulb if the leftmost 3-way switch is toggled?

a)

It will turn ON

b)

It will turn OFF

c)

Its state will not change

d)

It will flicker intermittently

6.

What type of electrical components are labeled 'A' and 'C' in the circuit diagram?

a)

Diodes

b)

Capacitors

c)

Inductors

d)

Light Emitting Diodes

7.

What is the theoretical output resistance (R_out) of an ideal operational amplifier?

a)

Infinite

b)

Typically 1 MΩ

c)

Zero

d)

Typically 100 Ω

8.

Based on the electric field lines shown, what is the sign of charge 1?

a)

Positive

b)

Negative

c)

Neutral

d)

Cannot be determined

9.

How does the total equivalent resistance of the circuit change when the switch is closed?

a)

It increases

b)

It decreases

c)

It remains the same

d)

It becomes infinite

10.

Generators convert ______ energy to ______ energy.

a)

Mechanical; Electrical

b)

Electrical; Mechanical

c)

Chemical; Thermal

d)

Thermal; Mechanical

11.

True or False: In the depicted state for switch S1, the common terminal (black dot) is connected to the lower of the two output terminals.

a)

True

b)

False

12.

Static electricity has an alternating current.

a)

True

b)

False

13.

Which of the following portions of the electromagnetic spectrum (per the IEEE band naming scheme) is at the lowest frequency?

a)

X band

b)

Ku band

c)

S band

d)

V band

14.

An antenna that radiates in all directions equal is considered:

a)

Directional

b)

Isotropic

c)

Resonant

d)

Omnidirectional

15.

Which of the following Boolean expressions correctly represents the output Q of the logic gate shown in the diagram? A diagram of a logic gate with two inputs labeled A and B, and an output labeled Q. The gate is an OR gate with a small circle (representing NOT) at the output, indicating a NOR gate.

a)

A AND B

b)

A OR B

c)

NOT (A AND B)

d)

NOT (A OR B)

e)

A XOR B

16.

Two tiny beads are 25 cm apart with no other charges or fields present. Bead A carries 10 μC of charge and bead B carries 1 μC. Which one of the following statements is true about the magnitudes of the electric forces on these beads?

a)

The force on A is 10 times the force on B.

b)

The force on B is 10 times the force on A.

c)

The force on A is exactly equal to the force on B.

d)

The force on A is 100 times the force on B.

e)

The force on B is 100 times the force on A.

17.

If the switch in the circuit is open, what is the equivalent resistance of the entire circuit in terms of R1 and R2?

a)

R1

b)

R2

c)

R1 + R2

d)

(R1 * R2) / (R1 + R2)

18.

Given the inputs to the top-left logic gate, what is its output?

a)

0

b)

1

c)

Undefined

19.

How many Light Emitting Diodes (LEDs) are present in the circuit diagram?

a)

1

b)

2

c)

3

d)

4

e)

5

20.

Applying Kirchhoff's Voltage Law to the loop containing R1, R2, and the voltage across their parallel combination, which statement is true regarding the voltage across R1 (VR1) and the voltage across R2 (VR2)?

a)

VR1 + VR2 = 12.0 V

b)

VR1 = VR2

c)

VR1 - VR2 = 6.0 V

d)

VR1 + VR2 = 0 V

e)

VR1 = 2 * VR2

21.

What is the voltage drop across the 23 Ω resistor in the branch connecting nodes f and h?

a)

5.75 V

b)

11.5 V

c)

23.0 V

d)

0.5 V

22.

For the purely capacitive AC circuit shown in Figure (a), what is the phase relationship between the current (I_C) flowing through the capacitor and the voltage (V_C) across it?

a)

Current lags voltage by 90 degrees

b)

Voltage leads current by 90 degrees

c)

Current and voltage are in phase

d)

Current leads voltage by 90 degrees

23.

If a small compass were placed at point C, what general direction would its North-seeking pole point, assuming the electromagnet is active?

a)

Towards point B

b)

Towards point D

c)

Towards point A

d)

Away from the electromagnet in an upward direction

24.

The operation of the transformer shown is based on the principle of electromagnetic induction. Which scientist is most famously associated with the discovery and formulation of this principle?

a)

André-Marie Ampère

b)

Michael Faraday

c)

Georg Ohm

d)

Nikola Tesla

25.

Which types of components are present in the given circuit diagram?

a)

Resistors, Voltage Sources, Current Sources

b)

Resistors, Current Sources

c)

Resistors, Voltage Sources

d)

Resistors, Capacitors, Inductors

26.

Power is calculated in a circuit by multiplying voltage times _____.

a)

resistance

b)

potential difference

c)

electric charge

d)

current

27.

Which of the following antenna types have no side lobes in their radiation pattern?

a)

Horn

b)

Yagi-Uda

c)

Helical

d)

Loop

e)

All have side lobes

28.

The relationship between current and voltage for the device is linear. True or False?

a)

True

b)

False

29.

What is the conductivity of copper? Copper has 8×10288\times10^{28} electrons/m3 and the mobility is 4.5×10−34.5\times10^{-3} m/s / N/C.

a)

2.84×1012Am−2/(V/m)2.84\times10^{12} Am^{-2}/(V/m)

b)

3.6×1026Am−2/(V/m)3.6\times10^{26} Am^{-2}/(V/m)

c)

5.76×107Am−2/(V/m)5.76\times10^7 Am^{-2}/(V/m)

d)

1.21×106Am−2/(V/m)1.21\times10^6 Am^{-2}/(V/m)

30.

What type of circuit configuration is shown between points A and B?

a)

Series

b)

Parallel

c)

Series-Parallel

d)

Wheatstone Bridge

e)

Delta

31.

What electronic device is represented by the given Ebers-Moll model?

a)

Diode

b)

Resistor

c)

Capacitor

d)

Bipolar Junction Transistor (BJT)

e)

Inductor

32.

If P = 50 watt and R = 2 ohms, then I = ?

a)

50 A

b)

5 A

c)

10 A

d)

2 A

33.

Above the Curie temperature, materials lose their ferromagnetic properties. All ferromagnetic materials have their own individual Curie temperatures.

a)

True

b)

False

34.

True or False: A Light Emitting Diode (LED) can be directly connected across a typical 9V battery without a current-limiting resistor and operate safely.

a)

True

b)

False

35.

The device shown in diagram 'a' operates on which fundamental principle of electromagnetism?

a)

Ohm's Law

b)

Coulomb's Law

c)

Electromagnetic Induction

d)

Kirchhoff's Voltage Law

36.

True or False: The Wheatstone bridge shown in the diagram is balanced.

a)

True

b)

False

37.

A small sphere with a mass of 441 g is moving upward along the vertical +y-axis when it encounters an electric field of 5.00 N/C. If, due to this field, the sphere suddenly acquires a horizontal acceleration of 13.0 m/s², what is the charge that it carries?

a)

1.15 C

b)

-1.15 C

c)

1150 C

d)

-1150 C

38.

Gustav Kirchhoff proved the moon contained sodium.

a)

True

b)

False

39.

Who found that a magnetic field surrounded a conductor carrying direct current?

a)

Volta

b)

Ohm

c)

Tesla

d)

Hertz

e)

Faraday

40.

A parallel plate capacitor has 1 μF capacitance. One of the plates is given +2μC charge and the other plate, +4μC charge. The potential difference developed across the capacitor is:

a)

3 V

b)

1 V

c)

2 V

d)

5 V

e)

Not enough info

41.

A Van de Graaff generator does not pose a danger because it produces a large ______ but a small ______.

a)

Current; voltage

b)

Voltage; charge

c)

Charge; voltage

d)

Voltage; current

42.

A student wants to create a magnetic field that is zero at the origin (x=0) and changes direction when crossing the origin, with a positive slope at the origin. Which graph best represents such a field?

a)

Graph (1)

b)

Graph (2)

c)

Graph (3)

d)

Graph (4)

e)

Graph (5)

43.

What is the voltage provided by the source labeled V1?

a)

1 V

b)

3 V

c)

5 V

d)

10 V

e)

12 V

44.

True or False: In the circuit's current configuration as shown, the light bulb is illuminated.

a)

True

b)

False

45.

In a coaxial cable, the outer braided conductor (not explicitly detailed in the simple cross-section but implied by the cable structure) serves a crucial function related to electromagnetic fields. What is its primary purpose?

a)

To increase the overall current carrying capacity of the cable.

b)

To provide mechanical protection against physical damage.

c)

To act as a shield against external electromagnetic interference and to contain internal fields.

d)

To reduce the cable's capacitance per unit length.

e)

To dissipate excess heat generated by the inner conductor.

46.

The graph displays which type of electrical signal?

a)

DC voltage

b)

Pulsating DC voltage

c)

Sinusoidal AC voltage

d)

Square wave AC current

47.

The image displays an exploded view of what common electromechanical device?

a)

Generator

b)

Transformer

c)

Solenoid

d)

Electric Motor

48.

What electrical component is represented by the zigzag lines in the circuit diagram?

a)

Capacitor

b)

Inductor

c)

Resistor

d)

Diode

e)

Transistor

49.

The questions in this section refer to the following circuit. Each resistor has a resistance of 1 Ω and the battery operates at 5 V. If resistor 1 is replaced with a silicon PN junction in forward-biased configuration, what happens to the readings on the voltmeter and ammeter?

a)

Both V and A increase

b)

V increases, A decreases

c)

V decreases, A increases

d)

Both V and A decrease

50.

Identify the type of device shown in the figure based on the provided i-v characteristics.

a)

Ideal voltage source

b)

Ideal current source

c)

Resistor

d)

Diode

e)

Capacitor

51.

Which statement describes Ohm's Law?

a)

Relates voltage, current and resistance

b)

The sum of voltages on a closed loop is 0

c)

Reduction of a circuit to a voltage source and resistor

d)

The sum of currents entering a node is 0

e)

Uses KVL for multiple loops simultaneously.

52.

In the circuit diagram as depicted, if a load (e.g., a light bulb) were connected across the two top terminals, would a complete circuit be formed, allowing current to flow from BAT1 through the load?

a)

True

b)

False

53.

In the depicted device, what is the primary function of the "Rotating rings" (also known as slip rings)?

a)

To reverse the direction of current every half cycle

b)

To provide a continuous electrical connection between the rotating coil and the stationary external circuit

c)

To amplify the induced voltage

d)

To convert AC to DC

54.

What happens to the voltage drop across the resistor when the switch is closed?

a)

It increases

b)

It decreases to approximately zero

c)

It remains the same

d)

It becomes equal to the battery voltage

55.

Based on the electric field lines shown, what is the sign of charge 2?

a)

Positive

b)

Negative

c)

Neutral

d)

Cannot be determined

56.

One ________ is equal to ~ electrons

a)

Ampere

b)

Coulomb

c)

Mole

d)

Proton

57.

What method of propagation does a TV remote control use?

a)

LOS

b)

Ground wave

c)

Sky wave

d)

None of the above

58.

The image displays a series of contour lines. If these lines represent equipotential lines in an electric field, which labeled point indicates a region where the electric field strength is approximately the greatest?

a)

A

b)

B

c)

C

d)

D

e)

E

59.

Which fundamental electrical law is most directly applied when setting up the equation to solve for the voltage at the common top node of the 4 Ω and 3 Ω resistors, given the currents entering and leaving it?

a)

Ohm’s Law

b)

Kirchhoff’s Voltage Law

c)

Kirchhoff’s Current Law

d)

Faraday’s Law of Induction

e)

Coulomb’s Law

60.

Is the Wheatstone bridge shown in the diagram balanced?

a)

Yes

b)

No

c)

Cannot be determined without R_L

d)

Only if R_L = 0

e)

Only if R_L is infinite

61.

The deflection of the alpha-particle beam as it passes through the uniform vertical magnetic field is primarily due to which fundamental interaction?

a)

Electric force

b)

Gravitational force

c)

Magnetic force

d)

Strong nuclear force

e)

Weak nuclear force

62.

What type of electrical component is represented by the zigzag line symbol in the circuit diagram?

a)

Capacitor

b)

Inductor

c)

Resistor

d)

Diode

63.

What type of current does the battery in the circuit typically provide?

a)

Alternating Current (AC)

b)

Direct Current (DC)

c)

Pulsating Current

d)

Inductive Current

64.

Kirchhoff's rules are the junction rule (also known as the current rule) and the loop rule (also known as the voltage rule). Which of the following statements is true?

a)

Both rules are based on the conservation of energy

b)

The junction rule is based on the conservation of energy and the loop rule is based on conservation of charge.

c)

Both rules are based on the conservation of charge

d)

The junction rule is based on the conservation of charge and the loop rule is based on conservation of energy.

e)

Two of the above.

65.

The thin layer of the crystal lattice between holes and electrons in a P-N junction is known as the

a)

silicon layer

b)

forward bias

c)

intrinsic semiconductor

d)

interbarrier

e)

depletion region

66.

Which DC motor is preferred for machine tools?

a)

Series Motor

b)

Shunt Motor

c)

Cumulative compound motor

d)

Differential Compound Motor

67.

True or False: Commutator is a part of transformer.

a)

True

b)

False

68.

When measuring current across a resistor, you should connect an analog ammeter in _____.

a)

Series with the resistor because if connected in parallel, there will be no current running through the d'Arsonval meter movement's coil.

b)

Parallel with the resistor because connecting in series will result in short-circuiting the ammeter.

c)

Parallel with the resistor because if connected in series, the ammeter will add too much resistance to the circuit, resulting in inaccurate measurement.

d)

Parallel with the resistor because it measures voltage drop directly across the resistor.

e)

Series with the resistor because if connected in parallel, the ammeter will become a short circuit, allowing electrons to bypass the resistor.

69.

The function Q = CV represents how much charge a capacitor can hold. Q (amount of charge) is measured in Coulombs. C stands for Capacitance. V stands for Voltage. True or False?

a)

True

b)

False

70.

What is the correct Boolean expression for the digital logic gate shown in the image, with inputs A and B and output Q?

a)

Q = A OR B

b)

Q = A AND B

c)

Q = NOT (A OR B)

d)

Q = NOT (A AND B)

e)

Q = A XOR B

71.

Who formulated laws that are essentially corollaries of Maxwell's equations at cases of low frequencies or when the frequency is equal to zero?

a)

Ohm

b)

Faraday

c)

Tesla

d)

Volta

e)

Kirchhoff

72.

What type of operational amplifier configuration is shown in the circuit diagram?

a)

Inverting Amplifier

b)

Non-inverting Amplifier

c)

Voltage Follower

d)

Summing Amplifier

73.

The Poynting Vector (μ) is defined as the cross product between the electric field and the magnetic field generated by an electromagnetic wave (in that order). It shows the direction of travel for a given electromagnetic wave. Given that an electromagnetic wave is traveling in the positive x-direction, which of the following situations is possible?

a)

The electric field is pointing in the negative y direction, while the magnetic field is pointing in the positive z-direction.

b)

The magnetic field is pointing in the negative y direction, while the electric field is pointing in the positive z-direction.

c)

The magnetic field is pointing in the positive x direction, while the electric field is pointing in the positive z-direction.

d)

The magnetic field is pointing in the negative y direction, while the electric field is pointing in the positive x-direction.

74.

If the wire used in the electromagnet shown were very thin and had low resistance, what potential hazard could arise from keeping the circuit connected for an extended period?

a)

The nail could become demagnetized.

b)

The battery could overheat or drain quickly.

c)

The magnetic field would become too weak.

d)

The wire would become superconductive.

75.

Where is the magnetic field the strongest? (pick 2 locations)

A
B
C
D
E
F
76.

Label the objects with their charge.

a)

Positive

b)

negative

c)

neutral

1
2
3
1)
2)
3)
77.

A​ (a)   is a complete electrical path. An ​ (b)   is an electrical path that is not complete.

Choose from the below words
closed circuit
open circuit
open current
closed current
78.

On the top of most batteries, electrons go in the ​ (a)   terminal and out of ​the (b)   terminal at the bottom.

Choose from the below words
positive
negative
neutral
equal
79.

Electric charges always flow from ​ (a)   areas to ​ (b)   areas.

Choose from the below words
negative
positive
neutral
80.

Ronnie was building a circuit connecting battery to a light bulb to a battery. The current flows due to a difference in potential energy called ​ (a)   . The light bulb is a ​ (b)   , which slows the flow of current in the circuit.

Choose from the below words

voltage

resistor

amperes

circuit

81.
A continuous flow of electricity is called_____________
a)
series
b)
circuit
c)
static
d)
current
82.

A string of lights with small bulbs is shown below. The bulbs are connected by wire that is covered in an insulator. When the lights are on, electricity travels in....

a)

a complete circuit

b)

a sound wave

c)

a light ray

d)

an incomplete path

83.

Match the following quantities with their units.

a)

Current, I

1.

Amps, A

b)

Voltage, V

2.

Volts, V

c)

Resistance, R

3.

Ohms, Ω

d)

Energy, E

4.

Joules, J

84.

The circuit shown below has a variable resistor connected to a 6.0 V battery.

The value of the current at several settings of the variable resistor is recorded in the table above. What amount of current flows through the battery when the variable resistor is set for 4 ohms?

a)

1.5 A

b)

1.0 A

c)

0.75 A

d)

0.50 A

85.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
86.
What is the unit for resistance?
a)
Volts
b)
Amperes
c)
Ohms
87.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
88.
What voltage is needed to cause a 50A current flow through a 10Ω resistor?
a)
15V
b)
500V
c)
500 kV
d)
0.2V
89.

What unit is used to measure voltage?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

90.
DC stands for ____ and is used in batteries.
a)
Distant Current
b)
Don't Current
c)
Direct Current
d)
Distributed current
91.

What is the job of a battery? (BEST answer)

a)

provide power

b)

provide energy

c)

turns the circuit on

d)

provide energy for the electrons to flow

92.
What happens to the current in a circuit as the resistance decreases?
a)
Current increases
b)
Current Decreases
c)
Current remains the same
93.

What is the unit of current?

a)

volts (V)

b)

amps (A)

c)

ohms (Ω)

d)

joules (J)

94.

How do you calculate current from voltage and resistance?

a)

Current = voltage x resistance

b)

Current = resistance x power

c)

Current = voltage ÷ resistance

d)

Current = resistance ÷ voltage

95.
The total voltage in a circuit with voltage drops of 15V, 25V, and 20V is?
a)
20V
b)
60V
c)
120V
d)
180V
96.

The two ends of a 3.0-ohm resistor are connected to a 9.0-V battery. What is the current through the resistor?

a)

27 A

b)

6.3 A

c)

3.0 A

d)

0.33 A

97.

Kirchoff's First Law states

a)

the sum of the currents entering any junction in an electric circuit must equal the sum of the currents leaving that junction

b)

the sum of the charges entering any junction in an electric circuit must equal the sum of the charges leaving that junction

c)

the sum of the emfs entering any junction in an electric circuit must equal the sum of the pds leaving that junction

d)

none of these

98.

Kirchhoff's current law states that _____.

a)

only Ohm’s law can be used to solve for unknown circuit values

b)

the total line current must be less than the sum of the branch currents

c)

the total current entering a point must equal the total current leaving a point

d)

the line current is always twice the sum of the branch currents

99.

According to Kirchhoff's Current Law, if three currents entering a junction are 2A, 3A, and 4A, what is the current leaving the junction?

a)

1A

b)

9A

c)

5A

d)

0A

100.

What happens to the total current in a series circuit if the resistance is increased?

a)

It increases.

b)

It decreases.

c)

It remains the same.

d)

It becomes zero.

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