Question 1
Question
Look at the following question
Answer
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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
Answer the following questions
Answer
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0.065 Ω
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0.552 Ω
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0.045 Ω
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0.055 Ω
Question 4
Question
Which of the following formulas can calculate power in a resistive circuit
Question 5
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 6
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 7
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 8
Question
3 x 20Ω resistors are connected in series to a 200V supply, calculate the total power of the circuit.
Answer
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10 KW
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0.666 KW
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0.333 KW
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12 KW
Question 9
Question
For the circuit shown the total resistance is
Question 10
Question
To measure the current through a load the meter must be connected
Question 11
Question
To measure the voltage across a load the meter must be connected
Question 12
Question
In the diagram below if I1 and I2 are ammeter readings then
Question 13
Question
In the diagram below instrument A measures
Answer
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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 14
Question
In the diagram below instrument B measures
Question 15
Question
Instrument A measures
Question 16
Question
Instrument E measures
Question 17
Question
For the circuit shown above the total current is
Question 18
Question
If four resistors each of 50 Ω are connected in parallel the overall resistance is
Question 19
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 20
Question
Which of the instrument numbers would measure voltage
Question 21
Question
When current flows in a conductor, a magnetic field is created around the conductor
Question 22
Question
Meter M1 will measure
Question 23
Question
Meter M2 will measure
Question 24
Question
Instrument 4 is measuring
Question 25
Question
Instrument 2 above is measuring
Question 26
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 27
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 28
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 29
Question
What is the formula for two resistors in parallel?
Answer
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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 30
Question
When the current through a conductor increases
Question 31
Question
The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is
Question 32
Question
The equation for current flowing in a resistive circuit is
Answer
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I = R/P
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I = R/V
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I = P/R
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I = V/R
Question 33
Question
The total resistance of two resistors of 20 Ohms and 35 Ohms connected in series is
Answer
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50 Ohms
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45 Ohms
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15 Ohms
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55 Ohms
Question 34
Question
When an electric current flows through a conductor it
Answer
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Cools down and expands
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Cools down and contracts
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Heats up and contracts
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Heats up and expands