Question 1
Question
Look at the following question
Answer

0.356 Ω

0.536 Ω

0.178 Ω

0.235 Ω
Question 2
Question
Answer the following question
Question 3
Question
Answer the following questions
Answer

0.065 Ω

0.552 Ω

0.045 Ω

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

10,000W

400W

1,000W

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

10 KW

0.666 KW

0.333 KW

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

the current through R3

the current through R1 and R2

the volt drop across R1 and R2

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

none of them

1 and 3

2 and 3

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

Nichrome

Steel

Aluminium

Copper
Question 27
Question
A poor conductor of electricity is:
Answer

Glass

Copper

Aluminium

Silver
Question 28
Question
The resistance of an electrical conductor is:
Answer

Affected by the weather

Determined by the formula I = P x V

Inversely proportional to length and proportional to c.s.a

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

R1 + R2/R1  R2

R1  R2/R1 x R2

R1 + R2/R1 x R2

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

I = R/P

I = R/V

I = P/R

I = V/R
Question 33
Question
The total resistance of two resistors of 20 Ohms and 35 Ohms connected in series is
Answer

50 Ohms

45 Ohms

15 Ohms

55 Ohms
Question 34
Question
When an electric current flows through a conductor it
Answer

Cools down and expands

Cools down and contracts

Heats up and contracts

Heats up and expands