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WorksheetsCSEC Physics - 09 Current Electricity / circuits
Total questions: 51
Worksheet time: 3570secs
What is the amount of current flowing through an electric press, if the amount of charge passing through a conductor in 10 minutes is 300 0 C?
30 A
.3 A
.5 A
5 A
A wire of length /, made of material resistivity ρ is cut into two equal parts. The resistivity of the two parts are equal to,
⍴
⍬
⍺
ג
A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is
2 × 10 5 Joule
2 × 10 3 Joule
2 x 10 4 Joule
2 x 102 Joule
Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is
Current
Voltage
Resistance
Resistivity
Which device or devices could be removed without breaking the electric circuit?
Only the bulb
Only the switch
The battery and the switch
The bulb and the switch
The shock you sometimes feel when you touch a metal doorknob on a dry day is electric ________.
Circuit
Current
Discharge
Resistance
Fuse wire has
high melting point
low melting point
high boiling point
low boiling point
total current
and the voltage through resistor 3.
Which of the following statements is/are true?
Charge is the fundamental quantity of electricity
There are two types of electric charge: positive and negative.
The SI unit for charge is Coulomb
All of the above
TRUE OR FALSE: Protons, which are located inside the atom of an object, is capable of moving out from their orbit.
True
False
TRUE OR FALSE: The movement or flow of electrons causes the presence of electric current.
True
False
What relationship exists between current and voltage when resistance is kept constant?
complementary
directly proportional
equal
inversely proportional
Which of the following refers to the ability of a material to reduce the flow of charge through it?
current
circuit
resistance
voltage
Which of the following is correct?
R = IV
R = I/V
I = R/V
V = IR
What is the unit of measurement of resistance?
Amperes
Ohms
Volts
Given the schematic diagram, which of the following components are present?
Select all that apply
switch
resistors
loads
conductors
source/ supply
Which of the following statements about series circuits are true?
It has more than one closed conducting path for current to flow through
if any part of the circuit is open, current still flows through the other closed parts of the circuit
both statements are true
none of the statements are true
Which of the following statements about parallel circuits are true?
It has more than one closed conducting path for current to flow through
if any part of the circuit is open, current still flows through the other closed parts of the circuit
both statements are true
none of the statements are true
What is the instrument use in measuring current?
ohmeter
ammeter
voltmeter
ruler
What is current?
It is the rate of flow of energy.
It is the product of charge and number of charges.
It is the rate of flow of charge.
It is the ratio of energy and time.
Which statement is correct?
Conductors can be viewed as a collection of positive ion fixed at their position and a large number of free electrons moving here and there.
Conventional current flow is the flow of negative charge from a negatively charged end to a positively charged end.
Charge carriers flow in a systematic way inside condutors even without battery or power supply.
Ammeter can be used as voltmeter.
What is the characteristic of an ideal voltmeter?
It has low resistance so electrons can flow through it.
It has high resistance so electrons can flow through it.
It has low resistance so electrons cannot flow through it.
It has high resistance so electrons cannot flow through it.
Which quantity measures how difficult an electric current pass through a material?
resistance
EMF
PD
electric current
The following affects resistance except
length of the wire
cross sectional area of the wire
electrical energy
temperature
What is the unit of electromotive force?
Newton
Joule
Ohm
Volt
Which of the following follows Ohm's law?
filament lamp
thermistor
ohmic resistor
diode
What is the current supplied in an appliance receiving 20kW of electric power from a 220V supply?
0.10 A
4400 A
9.1 A
440000 A
A 60W filament lamp is connected to a 230V. Calculate the energy dissipated in 2 minutes.
7200 J
120 J
30 J
0.5 J
Which of the following devices measures current in an electric circuit?
an ammeter
an ohmmeter
a voltage meter
a resistor
The illustration depicts a short circuit.
True
False
In a closed circuit, how does battery voltage affect current?
As voltage increases, current increases.
As voltage increases, current decreases.
Voltage has no affect on current.
If voltage exceeds current, a short circuit circuit will develop.
In a standard series circuit, the voltage is the same everywhere in the circuit.
True
False
Which of the following correctly states relationship between voltage, resistance, and current in a circuit?
Current is directly related to voltage but inversely related to resistance.
Current is directly related to both voltage and resistance.
Current is inversely related to both voltage and resistance.
Current is directly related to voltage but is not affected by resistance.
Which of the symbols represents current in an electrical circuit?
i
c
e
r
An electrical circuit is powered by a 1.5-volt battery and contains a light bulb producing 5 Ohms of resistance. There is also another 5 Ohm resistor in the circuit. How many amps of current are in this circuit? HINT: V = IR
0.15 amps
15.0 amps
6.67 amps
1.50 amps
An electrical circuit is powered by a 12-volt battery and contains a light bulb. The current flowing in the circuit is 20 amps. What is the resistance of the light bulb? HINT: V = IR
0.6 Ohms
240 Ohms
1.67 Ohms
12 Ohms
An electrical circuit is powered by a battery and contains a light bulb producing 1.5 Ohms of resistance. The circuit is flowing at 4 amps of current. What is the voltage of the battery?
HINT: V = IR
6.0 volts
1.5 volts
9.0 volts
12.0 volts
Electric field is a __________ quantity whose direction is defined as the direction that a ____________ test charge would be pushed when placed in the field.
vector, positive
vector, negative
scalar, positive
scalar, negative
The quantity electric potential is defined as the amount of:
electric potential energy
force acting upon a charge
potential energy per charge
force per charge
When work is done on a positive test charge by an external force to move it from one location to another, potential energy _________ (increases, decreases) and electric potential _________ (increases, decreases).
increases, increases
increases, decreases
decreases, increases
decreases, decreases
Moving an electron within an electric field would change the ____________ the electron.
mass of
amount of charge on
potential energy of
type of charge on
If an electrical circuit were analogous to a water circuit at a water park, then the battery voltage would be comparable to ___________________.
the rate at which water flows through the circuit
the speed at which water flows through the circuit
the distance that water flows through the circuit
the water pressure between the top and bottom of the circuit
the hindrance caused by obstacles in the path of the moving water
The diagram below at the right shows a light bulb connected by wires to the + and - terminals of a car battery. Compared to point D, point A is _______________ electric potential.
12 V higher in
12 V lower in
exactly the same
impossible to tell
