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Worksheets

Electricity - Ohm's Law

Total questions: 20

Worksheet time: 31mins

Name
Class
Date
1.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
2.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
3.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
4.

Electricity that flows in a closed path is called a

a)

path

b)

current

c)

circuit

d)

light

5.

Voltage divided by Resistance equals....?

(V / R = ?)

a)

Current

b)

Power

c)

Ohms

d)

Watts

6.

Voltage divided by Current equals...?

(V / I = ?)

a)

Current

b)

Power

c)

Resistance

d)

Watts

7.
If the Voltage is increased and the resistance stays the same, Current will
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
8.
If the Voltage stays the same and Resistance is increased, Current will 
a)
Increase
b)
Decrease
c)
Stay the same
d)
X
9.

What size resistor would produce a 3 Amp current flow with a 12 Volt battery (remember: V = I x R, or I = V/R, or R = V/I)

a)

1 Ohm

b)

3 Ohms

c)

4 Ohms

d)

12 Ohms

10.

What size resistor would produce a 3 Amp current flow with a 12 Volt battery (remember: V = I x R, or I = V/R, or R = V/I)

a)

1 Ohm

b)

3 Ohms

c)

4 Ohms

d)

12 Ohms

11.
The plastic covering is there to:
a)
Provide a conductor for electrical energy to flow.
b)
Provide an insulator so that electrical energy will not pass outside of the wires.
c)
Provide a conductor so that electrical energy can NOT flow.
d)
Provide an insulator so that electrical energy can flow.
12.

This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?

(remember: V = I x R, or I = V/R, or R = V/I)

a)

3 Amps

b)

192 Amps

c)

2 Amps

d)

4 Amps

13.

To complete a circuit the switch must be

a)

unattached

b)

open

c)

closed

d)

It depends

14.

The flow of electricity requires a

a)

complete path

b)

incomplete path

c)

insulated current

d)

complex circuit

15.

How do you calculate current (I, in Amps)

a)

Resistance X Voltage

b)

Voltage X Resistance

c)

Resistance ÷ Voltage

d)

Voltage ÷ Resistance

16.

The circuit shown on the picture above is an example of a /an _______

a)

Closed Circuit

b)

Open Circuit

17.

Based on the graph, which of the following would be true regarding the relationship of voltage and current?

a)

As voltage increases, current decreases.

b)

Voltage will not affect current.

c)

As voltage decreases, current increases.

d)

As voltage increases, current also increases.

18.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
19.

Ohms

a)
b)
c)
d)
20.

When using electricity, what are V, I, and R?

a)

Venezuela, India, Republic of Korea

b)

Variable, Integer, Real Number

c)

Violet, Indigo, Red

d)

Voltage, Current Intensity, Resistance

e)

Three letters