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Circuits and Ohms Law

Total questions: 34

Worksheet time: 30mins

Name
Class
Date
1.

What unit is used to measure voltage?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

2.

What unit is used to measure current?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

3.

What unit is used to measure resistance?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

4.

What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?

a)

12 V

b)

21 V

c)

4/3 V

d)

3/4 V

5.

What is the current in a circuit with 6 ohms of resistance and a battery containing 24 Volts?

a)

1/4 A

b)

144 A

c)

4 A

d)

0.4 A

6.

What is the resistance of a lightbulb that experiences 9 Volts and 3 amps of current?

a)

1/3 ohms

b)

3 ohms

c)

27 ohms

d)

9 ohms

7.

What is voltage?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

8.

If a circuit had 4 D-Cell batteries (each 1.5 V) and a lightbulb with resistance of 2 ohms, what is the current that flows through the circuit?

a)

2 A

b)

3 A

c)

6 A

d)

8 A

9.

What is resistance?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

10.

What is current?

a)

the amount of push the electrical source supplies to the circuit

b)

how much a given device resists the flow of electric current

c)

flow of electric charge

d)

none of the above

11.

This is most likely a calculation for total resistance in a ________________circuit

a)

parallel

b)

series

12.

Three resistors, RA=10 ΩR_A=10\ \Omega  , RB =20 ΩR_B\ =20\ \Omega  , and  RC = 25 ΩR_C\ =\ 25\ \Omega  , are connected in SERIES. The total resistance of this setup is equal to _____.

a)

 0.19 Ω0.19\ \Omega  

b)

 5.26 Ω5.26\ \Omega  

c)

 18.33 Ω18.33\ \Omega  

d)

 55 Ω55\ \Omega  

13.

What would you need to do to the voltage if you wanted to increase the current in a series circuit?

a)

Increase

b)

Greater

c)

Decrease

d)

Smaller

14.
A conductor is?
a)
material that current can pass through easily
b)
material that current cannot pass through easily
c)
magnet
d)
electric current
15.

This image represents what type of circuit?

a)

open

b)

circular

c)

series

d)

parallel

16.
Which way do electron flow?
a)
Positive to negative
b)
Negative to positive
c)
Negative to Negative
d)
Positive to Positive
17.

What does the cell / battery do in a circuit with a light bulb?

a)

Changes electrical energy into chemical energy

b)

Changes chemical energy into light energy

c)

Uses up electrical energy

18.
The Law of Conservation of Energy states:
a)
Energy can created or destroyed but not transformed 
b)
Energy cannot be created or destroyed, it can only transformed
c)
Energy can't be created, destroyed or transformed
19.
Energy can be created.
a)
True
b)
False
20.
Energy cannot be destroyed.
a)
True 
b)
False
21.
Energy is the ability _____________.
a)
to do work
b)
to power things
c)
to move objects
d)
to turn on a light
22.
A path that is made for an electric current is?
a)
Static electricity
b)
conductor
c)
A circuit
d)
resistor
23.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
24.

As resistance increases, the current in a circuit will

a)

increase

b)

decrease

c)

stay the same

d)

burn up

25.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
26.
As voltage increases, current
a)
Increases
b)
Decreases
c)
Stays the same
27.

How many 1.5 volt AAA batteries would you need to connect in series to create a 9 volt battery?

a)

1

b)

2

c)

3

d)

6

28.
Your body is a conductor of electricity.
a)
true
b)
false
29.

When the current through a fuse gets too high, the wire inside the fuse will...

a)

create a spark

b)

melt

c)

sound an alarm

d)

do nothing

30.

Select the correct advantages of circuit breakers over fuses.

a)

Circuit breakers can be reset.

b)

Circuit breakers are cheaper.

c)

Circuit breakers stop the current faster.

31.

A connection that allows current to take the path of least resistance is a

a)

short circuit

b)

long circuit

c)

parallel circuit

d)

series circuit

32.

What is a device that contains a thin strip of metal that melts if there is too much current through it called?

a)

third prong

b)

circuit breaker

c)

fuse

d)

short circuit

33.

What is the term for a reusable safety switch that breaks the circuit when the current gets too high?

a)

third prong

b)

fuse

c)

circuit breaker

d)

short circuit

e)

grounded

34.

Without a fuse or circuit breaker, what might happen in a house with an overloaded electric circuit?

a)

the thin piece of metal would melt, breaking the circuit

b)

the metal band would heat up, disrupting the circuit

c)

a fire would start

d)

the electricity for the house would turn off

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