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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
Ohms
B
Volts
C
Watts
D
Amperes
2) The measurement of how the device or material reduces the electrical current that flows through it is called the ___.
A
resistance
B
voltage
C
fuse
D
circuit
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
voltage
C
current
D
amperes
4) The current in a circuit is measured in ____.
A
watts
B
ohms
C
volts
D
amperes
5) A device that changes electrical energy into mechanical energy is known as a(n)
A
electrical motor
B
generator
C
fuse
D
resistor
6) The two types of closed circuits are
A
series and parallel
B
parallel and open
C
series and potential
D
parallel and static
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
series
B
open
C
parallel
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
open
B
static
C
series
D
parallel
9) Which of the following prevents electrical fires and is composed of plastic that melts if a circuit becomes to hot?
A
circuit breaker
B
fuses
C
resistors
D
batteries
10) Resistance can change electrical energy into ____ energy and ____.
A
light, current
B
current, thermal
C
thermal, light
D
thermal, voltage
11) To find the electrical power you would use the following formula:
A
current/voltage
B
current x voltage
C
current x resistance
D
current/resistance
12) The rate at which electrical energy is converted to another form of energy is known as ____.
A
electrical currents
B
electrical power
C
electrical voltage difference
D
electrical voltage
13) The type of current that flows in only one direction through a wire is known as
A
series
B
alternating
C
direct
D
alterior
14) The measurement of the movement of electrons in a circuit is the ___.
A
current
B
resistance
C
energy
D
voltage
15) Ohm's Law states that ___.
A
the resistance is equal to the voltage times the current.
B
the current is equal to the voltage times the resistance
C
the voltage is equal to the current divided by the resistance
D
the current is equal to the voltage divided by the resistance.
16) Which of the following would not make an electromagnet stronger?
A
wrap the coils more tightly together around the iron core
B
use less coils
C
use a stronger voltage source
D
add more coils
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
3 Amps
B
1 Amp
C
1.33 Amps
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
0.9 kW
B
90 kW
C
90 watts
D
0.9 watts
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
0.15 Amps
B
6.67 Amps
C
60 Amps
D
23 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
2.4
B
240
C
240,000
D
0.24
*select an answer for all questions
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