Question 1
Question
Look at the following question
Answer
-
0.356 Ω
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0.536 Ω
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0.178 Ω
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0.235 Ω
Question 2
Question
Answer the following question
Question 3
Question
Which of the following formulas can calculate power in a resistive circuit
Question 4
Question
3 x 12Ω resistors are connected in parallel to a 200V supply, calculate the total power of the circuit.
Answer
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10,000W
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400W
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1,000W
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1,111W
Question 5
Question
Two resistors of 20 ohms and 40 ohms are connected in series across a 120v d.c. supply, the current flowing in the circuit will be:
Question 6
Question
If three resistors are connected in series and have resistances of 20 Ω, 30 Ω, and 40 Ω then the total resistance would be
Question 7
Question
3 x 20Ω resistors are connected in series to a 200V supply, calculate the total power of the circuit.
Answer
-
10 KW
-
0.666 KW
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0.333 KW
-
12 KW
Question 8
Question
For the circuit shown the total resistance is
Question 9
Question
To measure the current through a load the meter must be connected
Question 10
Question
To measure the voltage across a load the meter must be connected
Question 11
Question
In the diagram below if I1 and I2 are ammeter readings then
Question 12
Question
In the diagram below instrument A measures
Answer
-
the current through R3
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the current through R1 and R2
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the volt drop across R1 and R2
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the volt drop across R1 and R3
Question 13
Question
In the diagram below instrument B measures
Question 14
Question
Instrument A measures
Question 15
Question
Instrument E measures
Question 16
Question
For the circuit shown above the total current is
Question 17
Question
If four resistors each of 50 Ω are connected in parallel the overall resistance is
Question 18
Question
Which of the instrument numbers would measure current
Answer
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none of them
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1 and 3
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2 and 3
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1
Question 19
Question
Which of the instrument numbers would measure voltage
Question 20
Question
When current flows in a conductor, a magnetic field is created around the conductor
Question 21
Question
Meter M1 will measure
Question 22
Question
Instrument 4 is measuring
Question 23
Question
Instrument 2 above is measuring
Question 24
Question
Of the following materials which would be the BEST conductor of electricity?
Answer
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Nichrome
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Steel
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Aluminium
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Copper
Question 25
Question
A poor conductor of electricity is:
Answer
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Glass
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Copper
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Aluminium
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Silver
Question 26
Question
The resistance of an electrical conductor is:
Answer
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Affected by the weather
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Determined by the formula I = P x V
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Inversely proportional to length and proportional to c.s.a
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Proportional to the length and inversely proportional to the c.s.a
Question 27
Question
What is the formula for two resistors in parallel?
Answer
-
R1 + R2/R1 - R2
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R1 - R2/R1 x R2
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R1 + R2/R1 x R2
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R1 x R2/R1 + R2
Question 28
Question
When the current through a conductor increases
Question 29
Question
The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is
Question 30
Question
The total resistance of two resistors of 20 Ohms and 35 Ohms connected in series is
Answer
-
50 Ohms
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45 Ohms
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15 Ohms
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55 Ohms