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Current Electricity

Total questions: 43

Worksheet time: 24mins

Name
Class
Date
1.

Which one does NOT represent Ohm's Law?

a)

V = I x R

b)

R = VIR\ =\ \frac{V}{I}

c)

I = VR\frac{V}{R}

d)

I = RV\frac{R}{V}

2.
An example of a conductor is :
a)
a glass paperweight
b)
a plastic cap
c)
a metal screw
d)
a wooden handle
3.
In a series circuit  with 4 bulbs:
a)
a switch is never used
b)
all of the bulbs become dimmer if another bulb is added
c)
There are many paths for electricity to take
d)
the remaining 3 bulbs stay lit if one burns out
4.
An example of an insulator is:
a)
iron
b)
silver
c)
copper wire
d)
rubber
5.
All wires used in electric circuits should be covered with:
a)
a colored material.
b)
a conducting material.
c)
an insulating material.
d)
none of these.
6.
What part of a circuit is this object?
a)
power source
b)
load
c)
pathway
d)
switch
7.
What is the purpose of a switch?
a)
To open and close the circuit.
b)
To carry the electricity through the circuit.
c)
To make a fun clicking sound
d)
To supply the power to the circuit
8.
What are the components of a simple circuit?
a)
wires, switch, outlet
b)
battery, switch, motor
c)
wires, light bulb, motor
d)
wires, battery, light bulb
9.

What is another name for the wires in a circuit?

a)

Conductor

b)

Load

c)

Power Source

10.

What is an electric current?

a)

a build up of electrons

b)

the difference in charge between 2 points

c)

the flow of electrons over a circuit

d)

the opposition to flow of electrons

11.
The flow of electricity in a circuit-
a)
current
b)
flow
c)
circuit
12.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
13.
What kind of circuit is this?
a)
series
b)
parallel
14.
If bulb 1 burns out, what will occur?
a)
bulbs 2 and 3 will go out
b)
bulbs 2 and 3 receive more volts
c)
bulbs 2 and 3 will stay lit
d)
nothing will happen
15.
Does this statement best describe a parallel or a series circuit.
 
When more light bulbs are added they all remain bright. 
a)
Parallel circuit
b)
Series circuit
16.

Does this statement best describe a parallel or a series circuit.


Different currents flow through each resistor.

a)

Parallel circuit

b)

Series circuit

17.
This is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
18.
What is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
19.

What is voltage?

a)

the rate of flow of charge

b)

the difference in charge between 2 points

c)

the amount of available charge

20.

What is resistance

a)

the rate at which a charge is flowing

b)

the material's tendency to resist flow of electrons

c)

the difference of charge between 2 points

d)

it is futile

21.

What is the unit we use to measure electric current?

a)

ampere (amp)

b)

ohm

c)

volt

d)

newton

22.

what is an electric cell?

a)

a device that converts mechanical energy into electrical energy

b)

a device that turns stored chemical energy into electrical energy

c)

a device that devours electrical energy

d)

a device that converts static electricity into mechanical energy

23.
What is another name for a battery in a circuit?
a)
Load
b)
Power Source
c)
Switch
24.
What is another name for a lightbulb in a circuit?
a)
Switch
b)
Load
c)
Power Source
25.

What does the I the symbol for in Ohm's law?

a)

current

b)

voltage

c)

power

d)

amperes

26.
What is the resistance of a 120 volt, 3 amp device?
a)
360
b)
40
c)
4
d)
0.025
27.
What isthe current in ampere through a 100 watt and 120 volt device?
a)
8.3
b)
0.83
c)
120
d)
109.5
28.
What 1 kW is equivalent to __________ watts?
a)
100 W
b)
1,000 W
c)
10,000 W
d)
10 W
29.
What is the wattage rating of a 240 volt, 6 amp device?
a)
1.44
b)
14.4
c)
144
d)
1440
30.
How is electrical pressure measured?
a)
ohm
b)
volts
c)
watts
d)
amps
31.
Resistance is measured in what unit?
a)
ohms
b)
amps
c)
watts
d)
volts
32.
Power is measured in what unit?
a)
amps
b)
volts
c)
watts
d)
ohms
33.
Current is measured in what unit?
a)
ohms
b)
volts
c)
watts
d)
amps
34.
What does the Greek letter Ω,  (i.e. Omega) represent?
a)
amps
b)
volts
c)
watts
d)
ohms
35.
if resistance of a circuit is tripled, and the voltage stays the same, the current will_
a)
double
b)
decrease by one third
c)
triple as will
d)
not change
36.
Potential difference is another term for
a)
current
b)
voltage
c)
energy
d)
watts
37.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
38.
If the voltage is increased and the resistance stays the same, current will ____.
a)
Increase
b)
Decrease
c)
Stay the same
d)
Not enough info
39.
If the voltage stays the same and resistance is increased, current will ________. 
a)
Increase
b)
Decrease
c)
Stay the same
d)
Not enough info
40.
If a battery produces 12.6 Volts, what would be the current for a 6 Ohm resistor?
a)
2.1 Amps
b)
75.6 Amps
c)
0.5 Amps
d)
15 Amps
41.
Two resistors are connected to a source of voltage as shown in the diagram below. At which position should an ammeter be placed to measure the current passing only through resistor R1?
a)
1
b)
2
c)
3
d)
4
42.
Where should an ammeter be located to correctly measure the total current and where should a voltmeter be located to correctly measure the total voltage?
a)
ammeter at 3 and voltmeter at 4
b)
ammeter at 1 and voltmeter at 4 
c)
ammeter at 2 and voltmeter at 3 
d)
ammeter at 1 and voltmeter at 2
43.
How much time is required for an operating 60-watt light bulb to use 120 joules of electrical energy?
a)
2 sec
b)
.2 sec
c)
.5 sec
d)
5 sec

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