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Electric Circuits and Power

Total questions: 31

Worksheet time: 52mins

Name
Class
Date
1.
What is the total resistance (RT) across this circuit?
a)
3 kΩ
b)
10 kΩ
c)
13 kΩ
d)
16 kΩ
2.
As the resistance of a circuit increases, the current will...
a)
increase
b)
decrease
c)
stay the same
3.
The current going through the 45 ohm resistor is 
a)
0.05 amps
b)
0.2 amps
c)
0.1 amps
d)
5 amps
4.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
5.

What is another Equation for Power?

a)

Power = Potential Difference x Current (P=IV)

b)

Power = Potential Difference / Current (P=V/I)

c)

Power = Current / Potential Difference (P=I/V)

6.

What is the Equation for Charge Flow?

a)

Charge Flow = Current x Time (Q=It)

b)

Charge Flow = Current / Time (Q=I/t)

c)

Charge Flow = Time / Current (Q=t/I)

7.

Which are the Equations for Power?

a)

Power = Energy Transferred / Time (P=E/t)

b)

Power = Work Done / Time (P=W/t)

c)

Power = Energy Transferred x Time (P=Et)

d)

Power = Work Done x Time (P=Wt)

8.
what is the power of a lamp whose current is 6 A and the voltage across it is 120 V?
a)
120 W
b)
720 W
c)
16 W
d)
10 W
9.
What is a kilo equal to?
a)
100
b)
1,000
c)
100,000
d)
1,000,000
10.
What does the Greek letter Ω,  (i.e. Omega) represent?
a)
amps
b)
volts
c)
watts
d)
ohms
11.
Resistance is measured in what unit?
a)
ohms
b)
amps
c)
watts
d)
volts
12.
Power is measured in what unit?
a)
amps
b)
volts
c)
watts
d)
ohms
13.
Current is measured in what unit?
a)
ohms
b)
volts
c)
watts
d)
amps
14.

PD

a)

potential difference = current × resistance

b)

potential difference = current / resistance

c)

potential difference = resistance / current

15.

A wire has a resistance of 10 Ω\Omega  . It's length is now tripled, what would its new resistance be?

a)

30Ω

b)

20Ω

c)

10Ω

d)

40Ω

16.

Select all units of current in the list below:

a)

mA

b)

C

c)

V

d)

A

e)

m

17.

How much charge flows through a wire in 80s if the current is a constant 5.4A?

a)

432C

b)

360C

c)

524C

d)

344C

18.
If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?
a)
5 V
b)
12 V
c)
0.2 V
d)
20 V
19.

What is this circuit symbol for?

a)

Thermistor

b)

Ammeter

c)

Variable Resistor

d)

Piece of wire

20.

What does voltage mean?

a)

The amount of energy per charge

b)

The amount of power per charge

c)

The amount of electrons per second

d)

The amount of seconds per charge

21.

Potential difference is the same as...?

a)

Voltage

b)

Current

c)

Power

d)

Coulombs

22.

What is the voltage of a bulb which produces 20J of energy for 2 Coulombs of charge?

a)

10V

b)

40V

c)

0.1V

d)

15V

23.
A correct statement of Ohm’s Law is:
a)
I= V R
b)
V ∝ I
c)
V = IR
d)
both b and c
24.

What is the resistance of a bulb if a current of 0.5 A flows through it when there is a voltage of 12 V across it?

a)

24 Ω

b)

6 Ω

c)

24 A

d)

6 A

25.

What is the equation for energy transferred in a circuit?

a)

E=IVtE=IVt

b)

E=ItVE=\frac{I}{tV}

c)

E=IVtE=\frac{IV}{t}

d)

E=tIVE=\frac{t}{IV}

26.
A battery or other device which provides energy for a circuit
a)
Conductor
b)
Power source
c)
Parallel circuit
d)
Complete circuit
27.
Switch
a)
The part of a circuit which can control whether electricity flows
b)
An electrical force which occurs as electrons are built up in an object
c)
A small device that stores energy in a chemical form
d)
The area of a conductor through which a current is able to move
28.
a)
Series circuit
b)
Incomplete circuit
c)
Parallel circuit
d)
Power source
29.
What is an insulator?
a)
The area of a conductor through which a current is able to move
b)
A material which does not allow electricity to go through it
c)
The amount of devices which are in a circuit
d)
A battery or other device which provides energy for a circuit
30.
When there are several path for the current to follow
a)
Pathway
b)
Conductor
c)
Series circuit
d)
Parallel circuit
31.
The flow of electricity through a conductor
a)
Battery
b)
Current
c)
Static electricity
d)
Switch

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