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WorksheetsElectricity Post Test
Total questions: 55
Worksheet time: 6hrs 25mins
Name
Class
Date
1.
An alternating current:
a)
Flows in 1 direction only
b)
turns on and off repeatedly
c)
flows in one direction only
d)
reverses direction repeatedly
2.
The type of current produced by a battery is:
a)
induced current
b)
alternating current
c)
magnetic current
d)
direct current
3.
What causes current to flow?
a)
potential difference
b)
energy
c)
electricity
d)
magnetism
4.
An example of a voltage source is a(n)
a)
magnet
b)
electrical wire
c)
battery
d)
a resisitor
5.
According to Ohm's law, Resistance is equal to to voltage divided by:
a)
potential difference
b)
conduction
c)
time
d)
current
6.
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
7.
A device that uses electrical energy as it interferes with the flow of charge is a:
a)
resistor
b)
conductor
c)
insulator
d)
superconductor
8.
What is a circuit?
a)
A pathway that electricity flows in. It has a load, wire, and a taco
b)
A pathway that protons flow in. It has a load, wire, and a power source.
c)
A pathway that electricity flows in. It has a load, wire, and a power source.
d)
A pathway that electricity flows in. It has a load and wire.
9.
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 is divided between the three light bulbs.
10.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from more than one source.
c)
Electricity flows along more than one pathway.
d)
The flow of electricity comes from more than 1 load.
11.
What will happen if one light bulb is removed from this circuit?
a)
The other bulbs will go out.
b)
The other bulbs will get brighter.
c)
The other bulbs will get dimmer.
d)
The battery will become stronger.
12.
Which best describes a simple series circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from the switch.
c)
Electricity flows along many pathways.
d)
The flow of electricity comes from the light bulb.
13.
A circuit with more than one path for energy to travel on is?×
a)
A. Series circuit
b)
B. Parallel circuit
c)
C. Ohm's Law
d)
D. Power=Voltage × Current
14.
What is an Electric Current?
a)
A. An Electric Field
b)
B. An Ampere
c)
C. The flow of electric charge.
15.
What is Electric Power?
a)
A. The rate that an appliance converts energy to another appliance
b)
B. A series circuit
c)
C. A parallel circuit
16.
What is Ohm's Law?
a)
A. I=V/R
b)
B. R=V/I
c)
C. Power= Voltage × Current
d)
D. A&B
17.
A closed path that electric current follows
a)
Voltage
b)
Current
c)
Resistance
d)
Circuit
18.
The flow/movement of electric charges
a)
Voltage
b)
Resistance
c)
Current
d)
Circuit
19.
This is related to the force that causes electric charges to flow
a)
Voltage
b)
Current
c)
Resistance
d)
Circuit
20.
The current has only has one loop to flow through in this circuit.
a)
Series Circuit
b)
Parallel Circuit
21.
This circuit contains two or more branches for current to move through.
a)
Series Circuit
b)
Parallel Circuit
22.
What is a circuit?
a)
A pathway that electricity flows in. It has a load, wire, and a taco
b)
A pathway that protons flow in. It has a load, wire, and a power source.
c)
A pathway that electricity flows in. It has a load, wire, and a power source.
d)
A pathway that electricity flows in. It has a load and wire.
23.
What charge does an electron have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
24.
What charge does a proton have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
25.
Resistance is affected by a material’s
a)
temperature.
b)
thickness.
c)
length.
d)
all of these.
26.
Circuits in homes are usually wired in
a)
series.
b)
parallel.
c)
aluminum wire.
d)
series with a fuse.
27.
The number of electrons flowing is called _____.
a)
voltage.
b)
power.
c)
current.
d)
resistance.
28.
Which circuit will have the brightest bulbs when the switch is closed?
a)
Circuit A
b)
Circuit B
c)
Circuit C
d)
All will have the same brightness.
29.
A 20-volt relay has a coil resistance of 200 ohms. How much current does it draw? V=IR, P=IV
a)
0.10 A
b)
10 A
c)
400 A
d)
4000 A
30.
A battery is connected to a resistor. Increasing the resistance of the resistor will
a)
increase the current in the circuit
b)
decrease the current in the circuit
c)
not effect the current in the circuit
31.
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.
32.
What is the unit of electrical power?
a)
watt
b)
volt
c)
ampere
d)
ohm
33.
If you know the power rating of an appliance and the voltage of the line it is attached to, you can calculate the current the appliance uses by
a)
multiplying the voltage by the power.
b)
dividing the power by the voltage.
c)
dividing the voltage by the power.
d)
subtracting the power from the voltage.
34.
Electric “pressure” is called
a)
power.
b)
resistance.
c)
voltage.
d)
current.
35.
A DC electric motor transforms 2.50 kW of electrical power into mechanical form. If the motor's operating voltage is 300 volts, how much current does it "draw" when operating at full load (full power output)?
a)
750 A
b)
0.0083 A
c)
0.83 A
d)
8.3 A
36.
A Toyota Prius motor draws 35 amps of current. If the resistance in the electric motor is 8.3 ohms, what is the power output of the electric motor in a Toyota Prius?
a)
10.2 W
b)
290 W
c)
10.2 kW
d)
290 kW
37.
When the circuit is_______,current does not flow
a)
resistors
b)
heat
c)
closed
d)
open
38.
Electrons leave the ______ of a battery and enter the ______ of the battery.
a)
Positive terminal, positive terminal
b)
Negative terminal, negative terminal
c)
Negative terminal, positive terminal
d)
Positive Terminal, Negative Terminal
39.
Which wire will have the greatest resistance?
a)
Blue
b)
White
c)
Red
d)
Orange
40.
Which of the following best illustrates the energy transformation when a lamp is turned on?
a)
Electromagnetic + Heat -> Electrical Potential -> Electrical Kinetic
b)
Electrical Kinetic- Chemical Potential -> Electrical Potential -> Electromagnetic
c)
Electrical Potential -> Electrical Kinetic -> Electromagnetic + Thermal
d)
Chemical Potential and Electrical Potential -> Electrical Kinetic -> Thermal + Electromagnetic
41.
Flash lights use _____ energy, and produce ______energy.
a)
electrical, thermal
b)
thermal, light
c)
mechanical, thermal
d)
electrical, light
42.
Which of the following shows an energy transformation from chemical energy to electrical to light energy?
a)
A bolt of lightning lights the night sky.
b)
A candle glows brightly in the dark.
c)
A fire in a fireplace lights up a room.
d)
A battery causes a flashlight to shine.
43.
What kind of circuit is this?
a)
series
b)
parallel
44.
How would you describe the voltage drop at each bulb in this 2 bulb series circuit if the battery where 6 volts?
a)
Each bulb would experience 0 volts of the potential energy.
b)
Each bulb would receive 6 volts of the potential energy.
c)
Each bulb would receive an equal amount of voltage as long as resistance was the same. Each bulb would measure 3 volts.
45.
Current Electricity is compared to movement of water in a pipe. If one was to compare the electrical circuit to a plumbing system, what would represent the copper wires?
a)
amount of water flowing past a given point
b)
the size (width and length) of a section of the pipe
c)
the pump pushing the water
d)
the rate at which the water does work
46.
Which of the following analogies relating to cars driving on a road would best represent the concept of electrical resistance
a)
steepness of incline if driving uphill
b)
the number of lanes of traffic in one direction
c)
speed bumps or potholes
d)
all of the above are possible
47.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
48.
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
49.
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
50.
12 Volt battery with two resistors in series 3 Ohms & 4 Ohms what would the current draw be
a)
2.1
b)
1.71 Amps
c)
2.4 Amps
d)
15 Amps
51.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
52.
A Charging system producing 14.5 Volts with a current flow of 43.5 Amps, what is the circuit resistance
a)
58 Amps
b)
0.33 Amps
c)
13 Amps
d)
1 Amp
53.
What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts
a)
15 Ohms
b)
4 Ohms
c)
0.3333 Ohms
d)
2 Ohms
54.
With the engine running the charging system produces 14.5 Volts what would the current flow be if a resistance of 6 Ohms was present
a)
2.41 Ohms
b)
2.52 Ohms
c)
2.1 Ohms
d)
0.3333 Ohms
55.
Would would best complete this circuit?
a)
A wire
b)
A switch
c)
A battery
d)
A light bulb
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