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Electricity Exam Review
Test Description: Freshman Academy Electricity Exam Review
Instructions: Answer all questions to get your test result.
1) What units are used to measure resistance?
A
Watts
B
Ohms
C
Amperes
D
Volts
2) The measurement of how the device or material reduces the electrical current that flows through it is called the ___.
A
voltage
B
circuit
C
fuse
D
resistance
3) The measurement of the electrical potential difference between the positive and negative portions of a battery is known as ____. This is the force that pushes the current along the circuit.
A
watts
B
current
C
voltage
D
amperes
4) The current in a circuit is measured in ____.
A
ohms
B
watts
C
volts
D
amperes
5) A device that changes electrical energy into mechanical energy is known as a(n)
A
resistor
B
generator
C
fuse
D
electrical motor
6) The two types of closed circuits are
A
series and parallel
B
parallel and static
C
parallel and open
D
series and potential
7) The type of closed circuit in which the electrons have only one path or loop to travel through is known as a ___ circuit.
A
parallel
B
open
C
series
D
static
8) The type of closed circuit in which you can add or remove light bulbs with no effect on the other bulbs in the circuit.
A
series
B
open
C
static
D
parallel
9) Which of the following prevents electrical fires and is composed of plastic that melts if a circuit becomes to hot?
A
batteries
B
resistors
C
fuses
D
circuit breaker
10) Resistance can change electrical energy into ____ energy and ____.
A
current, thermal
B
thermal, voltage
C
thermal, light
D
light, current
11) To find the electrical power you would use the following formula:
A
current x voltage
B
current/resistance
C
current/voltage
D
current x resistance
12) The rate at which electrical energy is converted to another form of energy is known as ____.
A
electrical power
B
electrical currents
C
electrical voltage
D
electrical voltage difference
13) The type of current that flows in only one direction through a wire is known as
A
alterior
B
direct
C
series
D
alternating
14) The measurement of the movement of electrons in a circuit is the ___.
A
current
B
voltage
C
resistance
D
energy
15) Ohm's Law states that ___.
A
the current is equal to the voltage divided by the resistance.
B
the current is equal to the voltage times the resistance
C
the resistance is equal to the voltage times the current.
D
the voltage is equal to the current divided by the resistance
16) Which of the following would not make an electromagnet stronger?
A
use a stronger voltage source
B
use less coils
C
add more coils
D
wrap the coils more tightly together around the iron core
17) Use Ohm's Law to determine the current found in a circuit that has a 1.5 V battery and a light bulb with a resistance of 2 Ohms.
A
1.33 Amps
B
3 Amps
C
1 Amp
D
0.75 Amps
18) A calculator uses a 9 Volt battery and draws 0.1 A of current. How much power does it use?
A
90 kW
B
0.9 watts
C
90 watts
D
0.9 kW
19) A toy car with a resistance of 20 Ohms is connected to a 3 Volt battery. How much current flows in the car?
A
23 Amps
B
0.15 Amps
C
6.67 Amps
D
60 Amps
20) The current flowing in an appliance connected to a 120 Volt source is 2 Amps. How many KILOWATTS of power does the appliance use?
A
240
B
240,000
C
0.24
D
2.4
*select an answer for all questions
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