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WorksheetsMod 3 Electrical Circuits
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
How is current measured with an in-line type meter?
a)
a. By placing an ammeter in series with the circuit
b)
b. By placing a voltmeter in parallel with the circuit
c)
c. By using a continuity tester
d)
d. By using an ohmmeter
2.
A circuit has a source voltage of 50V and a current of 10A. What is the power in watts?
a)
100
b)
250
c)
500
d)
1,500
3.
Voltage is defined as the _____.
a)
a. force that causes electrons to flow
b)
b. opposition to current flow
c)
c. basic unit in which current is measured
d)
d. current flowing through a conductor
4.
If a circuit has 12 amps of current and the resistance is 20 ohms, the applied voltage is _____.
a)
120V
b)
240V
c)
270V
d)
380V
5.
If two 10-ohm resistors are connected in series, what is the total resistance of these resistors?
a)
100 ohms
b)
20 ohms
c)
5 ohms
d)
1 ohm
6.
Make sure the voltage is turned off before touching any terminals by using a(n) _____.
a)
a. continuity tester
b)
b. ammeter
c)
c. ohmmeter
d)
d. voltage tester
7.
How many amps are there in the current of a circuit if the voltage source is 140V and the resistance is 2 ohms?
a)
12A
b)
70A
c)
160A
d)
280A
8.
Materials with electrical characteristics that fall between those of insulators and conductors are considered _____.
a)
a. charged
b)
b. magnetic
c)
c. semiconductors
d)
d. stable
9.
What is the applied voltage if the current in a circuit is 60 amps and the resistance is 10 ohms?
a)
a. 6 volts
b)
b. 60 volts
c)
c. 600 volts
d)
d. 6,000 volts
10.
Copper is considered a(n) _____.
a)
a. semiconductor
b)
b. insulator
c)
c. conductor
d)
d. semi-insulator
11.
Which of the following is used to step voltage down to lower levels before it reaches a home or office?
a)
a. Transformer
b)
b. Generator
c)
c. Conductor
d)
d. Insulator
12.
What is the applied voltage of a circuit that has 10 amps of current and 12 ohms of resistance?
a)
a. 1.2 volts
b)
b. 12 volts
c)
c. 60 volts
d)
d. 120 volts
13.
A 5-ohm and a 20-ohm resistor are connected in parallel. What is the total resistance of these two resistors?
a)
a. 100 ohms
b)
b. 25 ohms
c)
c. 4 ohms
d)
d. 2 ohms
14.
Which of the following terms is defined as the driving force that makes current flow in a circuit?
a)
a. Voltage
b)
b. Negative potential
c)
c. Coulomb
d)
d. Joule
15.
If the resistance of a circuit is 25 ohms and the current is 10 amps, the power in watts is _____.
a)
250
b)
500
c)
1,500
d)
2,500
16.
Ohm's law states that the resistance of a circuit is equal to the _____.
a)
a. current divided by the voltage
b)
b. voltage divided by the current
c)
c. voltage multiplied by the current
d)
d. current subtracted from the voltage
17.
If a circuit has 48 amps of current and an applied voltage of 240 volts, the resistance is _____.
a)
a. 5 ohms
b)
b. 10 ohms
c)
c. 15 ohms
d)
d. 25 ohms
18.
You would measure resistance with a(n) _____.
a)
a. clamp-on ammeter
b)
b. ohmmeter
c)
c. voltage tester
d)
d. voltmeter
19.
Which of the following substances is considered a good semiconductor?
a)
a. Copper
b)
b. Porcelain
c)
c. Silicon
d)
d. Silver
20.
In a parallel circuit, the voltage drop _____.
a)
a. is divided between the loads
b)
b. is the same across all loads
c)
c. depends on the resistance of the load
d)
d. is converted to the equivalent series load and added together
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