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Worksheets

Circuits

Total questions: 35

Worksheet time: 3hrs 47mins

Name
Class
Date
1.

The picture shows an electrical circuit. This circuit is a series circuit because:

a)

It has 3 light bulbs.

b)

The same current flows through all three light bulbs.

c)

It uses a single battery.

d)

The electrical current has more than one path to flow through

2.
This circuit won't work. What essential part is missing from this circuit?
a)
resistance
b)
source of electric current
c)
conductor
d)
ammeter
3.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
4.

A 2.0-ohm resistor and a 4.0-ohm resistor are connected in series with a 12-volt battery. If the current through the 2.0-ohm resistor is 2.0 amperes, the current through the 4.0-ohm resistor is

a)

1.0 A

b)

2.0 A

c)

3.0 A

d)

4.0 A

5.

The voltage dropped across the 300 ohm resistor is

a)

6 V

b)

9 V

c)

2 V

d)

30 V

6.

The total current through this circuit is

a)

0.02 amps

b)

0.09 amps

c)

50 amps

d)

9 amps

7.
What is an electrical circuit?
a)
lets you turn the energy on and off
b)
a closed path where where electricity flows
c)
stop electricity from flowing through
8.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
9.
Which of the following can work as an energy source?
a)
Battery
b)
Light bulb
c)
Wire
d)
All of them
10.
Which is NOT true of a series circuit
a)
One light bulb can be broken and other lights will still work.
b)
All loads are a single loop
c)
Adding more loads will lessen the current in the loop
11.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
12.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
13.

What is this the symbol for?

(a)  

14.

What is this the symbol for?

(a)  

15.

What is this the symbol for?

(a)  

16.

What is this the symbol for?

(a)  

17.

What is this the symbol for?

(a)  

18.

The plus sign on a battery shows which terminal?

a)

Positive

b)

Negative

19.

The 3 components needed to complete a light circuit are? (Choose 3)

a)

Motor

b)

Light bulb

c)

Switch

d)

Wires

e)

Battery

20.

Which of the following devices measures current in an electric circuit?

a)

an ammeter

b)

an ohmmeter

c)

a voltage meter

d)

a resistor

21.

Which of the following correctly states relationship between voltage, resistance, and current in a circuit?

a)

Current is directly related to voltage but inversely related to resistance.

b)

Current is directly related to both voltage and resistance.

c)

Current is inversely related to both voltage and resistance.

d)

Current is directly related to voltage but is not affected by resistance.

22.

What unit is used to measure current?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

23.

What unit is used to measure resistance?

a)

Ohms

b)

Omega

c)

Volts

d)

Amps

24.

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

25.
What is Resistance?
a)
The flow of electrons
b)
Electric potential difference
c)
A battery
d)
The ability to reduce the flow of electrons
26.
The mathematical relationship among Voltage, Current, and Resistance
a)
Faraday's Law
b)
Tesla's Law
c)
Edison's Law
d)
Ohm's Law
27.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
28.

What would happen if in a circuit the voltage is increase?

a)

The time would increase

b)

The current would increase

c)

The current would decrease

d)

The current would stay the same

29.

Look at the diagram. What is the term for "B"?

a)

Conductor

b)

Switch

c)

Transformer

d)

Source

30.

What is the equivalent or total resistance (Re) across this circuit?

a)

3 kΩ

b)

10 kΩ

c)

13 kΩ

d)

18 kΩ

31.

Solve for the total resistance of the circuit shown

a)

50 V

b)

1970 ohms

c)

705 K ohms

d)

20 Amps

32.

Which circuit diagram represents the correct way to measure the current in a resistor?

a)
b)
c)
d)
33.

Solve for total Current in the circuit shown

a)

25 Amps

b)

35 amps

c)

25 milliamps

d)

35 milliamps

34.
What is a benefit of using a parallel circuit?  
a)
It gets confusing.
b)
There are no problems.
c)
If one light goes out, it does not affect the others. 
d)
If one light goes out, they all go out. 
35.
If the voltage across the battery was 10V in this diagram. What would the voltage across each bulb be?
a)
10V
b)
5V
c)
20V
d)
0V