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General Physics finals

Total questions: 60

Worksheet time: 30mins

Name
Class
Date
1.

MULTIPLE CHOICE. DIRECTIONS: Read each question carefully. Choose and write only the letter of correct answer on the answer sheet provided. A wire carries a current of 2.0 A. If 240 C of charge passes through the wire, how long did the current flow?

a)

60 s

b)

120 s

c)

240 s

d)

480 s

2.

MULTIPLE CHOICE. DIRECTIONS: Read each question carefully. Choose and write only the letter of correct answer on the answer sheet provided. A student builds a circuit with a 9 V battery and a 3 Ω resistor. Using Ohm’s law, what is the current?

a)

1 A

b)

2 A

c)

3 A

d)

4 A

3.

MULTIPLE CHOICE. DIRECTIONS: Read each question carefully. Choose and write only the letter of correct answer on the answer sheet provided. A. A dam storing water B. A container of water with no outlet C. A frozen lake D. A pipe allowing water to flow Which of the following best illustrates the concept of current as rate of flow of charge?

a)

A dam storing water

b)

A container of water with no outlet

c)

A frozen lake

d)

A pipe allowing water to flow

4.

MULTIPLE CHOICE. DIRECTIONS: Read each question carefully. Choose and write only the letter of correct answer on the answer sheet provided. If a fuse is placed in a household circuit, its function is primarily to:

a)

Increase current

b)

Prevent overheating

c)

Reduce voltage

d)

Store energy

5.

MULTIPLE CHOICE. DIRECTIONS: Read each question carefully. Choose and write only the letter of correct answer on the answer sheet provided. A conductor has a current of 5 A. How many electrons pass through a cross-section in 1 s? e=1.6×10−19Ce = 1.6 \times 10^{-19} C

a)

3.1×10193.1 \times 10^{19}

b)

5.0×10185.0 \times 10^{18}

c)

6.3×10196.3 \times 10^{19}

d)

8.0×10208.0 \times 10^{20}

6.

MULTIPLE CHOICE. DIRECTIONS: Read each question carefully. Choose and write only the letter of correct answer on the answer sheet provided. Which factor does not directly affect the current in a conductor?

a)

Resistance of the wire

b)

Temperature of conductor

c)

Type of battery

d)

Voltage applied

7.

MULTIPLE CHOICE. DIRECTIONS: Read each question carefully. Choose and write only the letter of correct answer on the answer sheet provided. A student calculates the current in a 12 Ω resistor connected across a 24 V battery. What is the current?

a)

1 A

b)

2 A

c)

3 A

d)

4 A

8.

A circuit has 0.5 A current. How much charge passes in 4 minutes?

a)

60 C

b)

100 C

c)

120 C

d)

240 C

9.

If two resistors are connected in series with a 10 V battery, how does current behave?

a)

It decreases in each resistor

b)

It increases in each resistor

c)

It remains the same in both

d)

It stops completely

10.

Current in metals is carried by__________.

a)

Electrons

b)

Ions

c)

Neutrons

d)

Protons

11.

A light bulb draws 0.4 A when connected to 6 V. What is its resistance?

a)

10 Ω

b)

12 Ω

c)

15 Ω

d)

18 Ω

12.

Which device measures current directly in a circuit?

a)

Ammeter

b)

Galvanometer

c)

Multiplier

d)

Voltmeter

13.

A current of 3 A flows through a motor for 10 s. What is the total charge?

a)

10 C

b)

15 C

c)

30 C

d)

300 C

14.

Current is defined as__________.

a)

Flow of energy

b)

Flow of mass

c)

Number of electrons present

d)

Rate of flow of charge

15.

In alternating current (AC), electrons__________.

a)

Flow slower than in DC

b)

Move in one direction only

c)

Remain stationary

d)

Vibrate back and forth

16.

A student increases the voltage across a resistor. What happens to the current?

a)

Becomes zero

b)

Decreases

c)

Increases

d)

Remains constant

17.

Which of the following is a unit of current?

a)

Ampere

b)

Coulomb

c)

Ohm

d)

Volt

18.

What is the symbol for current in equations?

a)

V

b)

I

c)

R

d)

C

19.

Current in a conductor flows because of___________.

a)

Balanced charges

b)

Difference in potential

c)

Difference in resistance

d)

Equal voltage

20.

The SI base unit of charge is_________.

a)

Ampere

b)

Coulomb

c)

Joule

d)

Volt

21.

Two resistors of 6 Ω and 12 Ω are connected in parallel. What is the equivalent resistance?

a)

3 Ω

b)

4 Ω

c)

6 Ω

d)

18 Ω

22.

If a wire is stretched to twice its length while keeping volume constant, what happens to its resistance?

a)

Doubles

b)

Halves

c)

Quadruples

d)

Triples

23.

Which material is best for making resistors in heaters?

a)

Aluminum

b)

Copper

c)

Nichrome

d)

Silver

24.

Which graph shows Ohm’s law (V vs. I)?

a)

Exponential curve

b)

Horizontal line

c)

Straight line through origin

d)

Silver

25.

A student gets inconsistent resistance values. Which factor is most likely the error?

a)

Constant temperature

b)

Correct unit used

c)

Heating of the resistor

d)

Proper connections

26.

Which of the following is an ohmic conductor?

a)

Diode

b)

Filament lamp

c)

Nichrome wire

d)

Transistor

27.

Resistance of a conductor depends on_____________.

a)

Length, area, material, temperature

b)

Pressure and density

c)

Speed of electrons

d)

Voltage and current only

28.

A resistor has a color code of red, violet, brown. Its resistance is__________.

a)
270 Ω
b)

2.7 Ω

c)

7 Ω

d)

27 Ω

29.

current through a resistor doubles, the power dissipated ________.

a)

Doubles

b)

Triples

c)

Remains constant

d)

Quadruples

30.

Which resistor combination results in the greatest resistance?

a)

Mixed

b)

None

c)

Parallel

d)

Series

31.

Which physical property causes resistance in conductors?

a)

Absence of charge

b)

Collisions of electrons with atoms

c)

Free flow of electrons

d)

Magnetic field

32.

A circuit has resistors 4 Ω and 8 Ω in series. What is total resistance?

a)

2 Ω

b)

4 Ω

c)

6 Ω

d)

12 Ω

33.

A 100 W bulb has lower resistance than a 40 W bulb because______________.

a)

It allows more current

b)

It is larger

c)

It is made of copper

d)

It has no filament

34.

Which of the following is the unit of resistance?

a)

Ampere

b)

Joule

c)

Ohm

d)

Volt

35.

The reciprocal of resistance is called___________.

a)

Capacitance

b)

Conductance

c)

Conductivity

d)

Resistivity

36.

Which property of a material resists current flow?

a)

Capacitance

b)

Conductance

c)

Inductance

d)

Resistivity

37.

A resistor connected across a battery converts electrical energy into_____________.

a)

Heat

b)

Light

c)

Pressure

d)

Sound

38.

Which factor increases resistance of a metal conductor?

a)

Increasing cross-sectional area

b)

Increasing length

c)

Decreasing temperature

d)

Using pure copper

39.

Increasing cross-sectional area Increasing length Decreasing temperature Using pure copper When resistors are in parallel, the equivalent resistance is:

a)

Always infinite

b)

Equal to sum of resistors

c)

Greater than largest resistor

d)

Less than smallest resistor

40.

The symbol Ω stands for_______,

a)

Ampere

b)

Joule

c)

Ohm

d)

Volt

41.

A battery has emf of 12 V and internal resistance 2 Ω. What is the terminal voltage at 3 A current?

a)

6 V

b)

9 V

c)

12 V

d)

18 V

42.

Emf is always smaller Emf ignores internal resistance Emf increases with current Emf is constant regardless of load Why is emf a more appropriate measure of a battery’s capability than terminal voltage?

a)

Current is too small

b)

Emf becomes negative

c)

Energy is not conserved

d)

Internal resistance consumes nearly all emf

43.

A 6 V battery with negligible internal resistance powers a 3 Ω resistor. How much work in 10 s?

a)

60 J

b)

120 J

c)

180 J

d)

360 J

44.

When a battery is short-circuited, terminal voltage drops because___________________.

a)

Current is too small

b)

Emf becomes negative

c)

Energy is not conserved

d)

Internal resistance consumes nearly all emf

45.

Emf is defined as ____________.

a)

Charge per unit voltage

b)

Current per second

c)

Resistance per unit length

d)

Work done per unit charge

46.

A cell of emf 2 V supplies 0.5 A current through external 3 Ω resistor. Internal resistance is_____,

a)

1 Ω

b)

2 Ω

c)

3 Ω

d)

6 Ω

47.

A 12 V battery supplies 1 A for 2 hours. Total energy delivered______.

a)

12 J

b)

24 J

c)

7200

d)

86400 J

48.

If emf of a source is 10 V and terminal p.d. is 8 V, then lost volts equal _______.

a)

1 V

b)

2 V

c)

8 V

d)

10 V

49.

Which statement about EMF is correct?

a)

Emf is same as resistance

b)

Emf depends on circuit current

c)

Emf equals terminal p.d. always

d)

Emf is potential difference across cell on open circuit

50.

A cell supplies maximum current when external resistance is ___________.

a)

Equal to internal resistance

b)

Greater than resistance

c)

Infinite

d)

Zero

51.

Which device converts chemical energy to electrical energy?

a)

Battery

b)

Capacitor

c)

Generator

d)

Resistor

52.

Terminal voltage of a cell is always _________.

a)

Equal to emf

b)

Greater than emf

c)

Independent of current

d)

Less than emf when current flows

53.

If a battery has emf 15 V and internal resistance 1 Ω, current through 4 Ω load is _______.

a)

2 A

b)

3 A

c)

4 A

d)

5 A

54.

The efficiency of a cell is given by ratio of?

a)

Current to resistance

b)

Emf to current

c)

Terminal p.d. to emf

d)

Resistance to emf

55.

When no current flows in a circuit, terminal voltage is equal to _______.

a)

Emf

b)

Infinite

c)

Internal resistance

d)

Zero

56.

Which instrument can measure EMF directly?

a)

Ammeter in series

b)

Galvanometer in parallel

c)

Resistor network

d)

Voltmeter across open circuit

57.

Emf of a cell is 2 V. How much work is done in moving 3 C charge?

a)

2 J

b)

3 J

c)

4 J

d)

6 J

58.

The emf of a Daniell cell is produced by _______.

a)

Electrochemical reaction

b)

Magnetic induction

c)

Mechanical motion

d)

Radiation

59.

A source has emf 12 V and internal resistance 2 Ω. It delivers maximum power when external resistance is _____.

a)

1 Ω

b)

2 Ω

c)

4 Ω

d)

6 Ω

60.

The SI unit of emf is _______.

a)

Ampere

b)

Joule

c)

Ohm

d)

Volt

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