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Subel. ZLB
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Subelement ZLB
Basic Electrical Theory
Section ZLB05
Ohm's Law
ZLB0501
The voltage across a resistor carrying current can be calculated using the formula
A.
E = I + R [voltage equals current plus resistance]
B.
E = I - R [voltage equals current minus resistance]
Correct Answer
C.
E = I x R [voltage equals current
times
resistance]
D.
E = I / R [voltage equals current divided by resistance]
ZLB0501
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ZLB0502
A 10 mA current is measured in a 500 ohm resistor. The voltage across the resistor will be
Correct Answer
A.
5
volt
B.
50 volt
C.
500 volt
D.
5000 volt
ZLB0502
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ZLB0503
The value of a resistor to drop 100 volt with a current of 0.8 milliampere is
A.
125 ohm
Correct Answer
B.
125 kilohm
C.
1250 ohm
D.
1.25 kilohm
ZLB0503
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ZLB0504
I = E/R is a mathematical equation describing
Correct Answer
A.
Ohm
's Law
B.
Thevenin's Theorem
C.
Kirchoff's First Law
D.
Kirchoff's Second Law
ZLB0504
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ZLB0505
The voltage to cause a current of 4.4 ampere in a 50 ohm resistance is
A.
2220 volt
Correct Answer
B.
220
volt
C.
22.0 volt
D.
0.222 volt
ZLB0505
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ZLB0506
A current of 2 ampere flows through a 16 ohm resistance. The applied voltage is
A.
8 volt
B.
14 volt
C.
18 volt
Correct Answer
D.
32
volt
ZLB0506
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ZLB0507
A current of 5 ampere in a 50 ohm resistance produces a potential difference of
A.
20 volt
B.
45 volt
C.
55 volt
Correct Answer
D.
250
volt
ZLB0507
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ZLB0508
This voltage is needed to cause a current of 200 mA to flow in a lamp of 25 ohm resistance
Correct Answer
A.
5
volt
B.
8 volt
C.
175 volt
D.
225 volt
ZLB0508
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ZLB0509
A current of 0.5 ampere flows through a resistance when 6 volt is applied. To change the current to 0.25 ampere the voltage must be
A.
increased to 12 volt
Correct Answer
B.
reduced to
3
volt
C.
held constant
D.
reduced to zero
ZLB0509
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ZLB0510
The current flowing through a resistor can be calculated by using the formula
A.
I = E x R [current equals voltage times resistance]
Correct Answer
B.
I = E / R [current equals voltage
divided
by resistance]
C.
I = E + R [current equals voltage plus resistance]
D.
I = E - R [current equals voltage minus resistance]
ZLB0510
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ZLB0511
When an 8 ohm resistor is connected across a 12 volt supply the current flow is
Correct Answer
A.
12 / 8 amps
B.
8 / 12 amps
C.
12 - 8 amps
D.
12 + 8 amps
ZLB0511
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ZLB0512
A circuit has a total resistance of 100 ohm and 50 volt is applied across it. The current flow will be
A.
50 mA
Correct Answer
B.
500
mA
C.
2 ampere
D.
20 ampere
ZLB0512
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ZLB0513
The following formula gives the resistance of a circuit
A.
R = I / E [resistance equals current divided by voltage]
B.
R = E x I [resistance equals voltage times current
C.
R = E / R [resistance equals voltage divided by resistance]
Correct Answer
D.
R = E / I [resistance equals voltage divided by current]
ZLB0513
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ZLB0514
A resistor with 10 volt applied across it and passing a current of 1 mA has a value of
A.
10 ohm
B.
100 ohm
C.
1 kilohm
Correct Answer
D.
10 kilohm
ZLB0514
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ZLB0515
If a 3 volt battery causes 300 mA to flow in a circuit, the circuit resistance is
Correct Answer
A.
10
ohm
B.
9 ohm
C.
5 ohm
D.
3 ohm
ZLB0515
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ZLB0516
A current of 0.5 ampere flows through a resistor when 12 volt is applied. The value of the resistor is
A.
6 ohms
B.
12.5 ohms
C.
17 ohms
Correct Answer
D.
24
ohms
ZLB0516
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ZLB0517
The resistor which gives the greatest opposition to current flow is
A.
230 ohm
B.
1.2 kilohm
C.
1600 ohm
Correct Answer
D.
0
.
5
megohm
ZLB0517
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ZLB0518
The ohm is the unit of
A.
supply voltage
B.
electrical pressure
C.
current flow
Correct Answer
D.
electrical
resistance
ZLB0518
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ZLB0519
If a 12 volt battery supplies 0.15 ampere to a circuit, the circuit's resistance is
A.
0.15 ohm
B.
1.8 ohm
C.
12 ohm
Correct Answer
D.
80
ohm
ZLB0519
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ZLB0520
If a 4800 ohm resistor is connected to a 12 volt battery, the current flow is
Correct Answer
A.
2
.
5
mA
B.
25 mA
C.
40 A
D.
400 A
ZLB0520
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