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Quiz by r.t.mathews, created more than 1 year ago

Quiz on Principles of basic electrical circuits, created by r.t.mathews on 24/11/2015.

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	Created by Vito Martino over 8 years ago

	Copied by r.t.mathews over 8 years ago

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quiz

2016-02-19T09:24:09Z

Principles of basic electrical circuits

Each question in this quiz is timed.

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Question 1 of 34

Look at the following question

Select one of the following:

0.356 Ω
0.536 Ω
0.178 Ω
0.235 Ω

Explanation

Question 2 of 34

Answer the following question

Select one of the following:

50 m
25 m
30 m
40 m

Explanation

Question 3 of 34

Answer the following questions

Select one of the following:

0.065 Ω
0.552 Ω
0.045 Ω
0.055 Ω

Explanation

Question 4 of 34

Which of the following formulas can calculate power in a resistive circuit

Select one of the following:

Explanation

Question 5 of 34

3 x 12Ω resistors are connected in parallel to a 200V supply, calculate the total power of the circuit.

Select one of the following:

10,000W
400W
1,000W
1,111W

Explanation

Question 6 of 34

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:

Select one of the following:

20 A
2 A
5 A
0.5 A

Explanation

Question 7 of 34

If three resistors are connected in series and have resistances of 20 Ω, 30 Ω, and 40 Ω then the total resistance would be

Select one of the following:

100 Ω
90 Ω
70 Ω
80 Ω

Explanation

Question 8 of 34

3 x 20Ω resistors are connected in series to a 200V supply, calculate the total power of the circuit.

Select one of the following:

10 KW
0.666 KW
0.333 KW
12 KW

Explanation

Question 9 of 34

For the circuit shown the total resistance is

Select one of the following:

10 Ω
15 Ω
100 Ω
90 Ω

Explanation

Question 10 of 34

To measure the current through a load the meter must be connected

Select one of the following:

across the load
in parallel with the supply
in parallel with the load
In series with the load

Explanation

Question 11 of 34

To measure the voltage across a load the meter must be connected

Select one of the following:

before the load
in parallel with the supply
in parallel with the load
In series with the load

Explanation

Question 12 of 34

In the diagram below if I1 and I2 are ammeter readings then

Select one of the following:

I2 will be greater than I1
I1 will be greater than I2
I1 will be equal to I2
I1 will be half I2

Explanation

Question 13 of 34

In the diagram below instrument A measures

Select one of the following:

the current through R3
the current through R1 and R2
the volt drop across R1 and R2
the volt drop across R1 and R3

Explanation

Question 14 of 34

In the diagram below instrument B measures

Select one of the following:

the current through R3
the current through R1
the volt drop across R1 and R2
the volt drop across R1

Explanation

Question 15 of 34

Instrument A measures

Select one of the following:

current through a resistor
supply current
Voltage across a resistor
supply voltage

Explanation

Question 16 of 34

Instrument E measures

Select one of the following:

current through a resistor
supply current
Voltage across a resistor
supply voltage

Explanation

Question 17 of 34

For the circuit shown above the total current is

Select one of the following:

0.1A
10A
20A
1.1A

Explanation

Question 18 of 34

If four resistors each of 50 Ω are connected in parallel the overall resistance is

Select one of the following:

25 Ω
100 Ω
12.5 Ω
200 Ω

Explanation

Question 19 of 34

Which of the instrument numbers would measure current

Select one of the following:

none of them
1 and 3
2 and 3
1

Explanation

Question 20 of 34

Which of the instrument numbers would measure voltage

Select one of the following:

none of them
3
2
1

Explanation

Question 21 of 34

When current flows in a conductor, a magnetic field is created around the conductor

Select one of the following:

when the voltage is high enough
only if it is a coil
as long as the current flows
only when d.c is applied

Explanation

Question 22 of 34

Meter M1 will measure

Select one of the following:

the supply current
the current through R1
the volt drop across R1 and R2
the volt drop across R1

Explanation

Question 23 of 34

Meter M2 will measure

Select one of the following:

the supply current
the current through R1
the volt drop across R2 and R3
the supply voltage

Explanation

Question 24 of 34

Instrument 4 is measuring

Select one of the following:

the supply current
the current through the resistor
the supply voltage
the voltage across the resistor

Explanation

Question 25 of 34

Instrument 2 above is measuring

Select one of the following:

the supply current
the current through the resistor
the supply voltage
the voltage across the resistor

Explanation

Question 26 of 34

Of the following materials which would be the BEST conductor of electricity?

Select one of the following:

Nichrome
Steel
Aluminium
Copper

Explanation

Question 27 of 34

A poor conductor of electricity is:

Select one of the following:

Glass
Copper
Aluminium
Silver

Explanation

Question 28 of 34

The resistance of an electrical conductor is:

Select one of the following:

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

Explanation

Question 29 of 34

What is the formula for two resistors in parallel?

Select one of the following:

R1 + R2/R1 - R2
R1 - R2/R1 x R2
R1 + R2/R1 x R2
R1 x R2/R1 + R2

Explanation

Question 30 of 34

When the current through a conductor increases

Select one of the following:

the voltage decreases
the temperature decreases
the temperature increases
the resistance decreases

Explanation

Question 31 of 34

The current in a circuit is 100A and the resistance is 0.1 Ohm. The supply voltage is

Select one of the following:

Explanation

Question 32 of 34

The equation for current flowing in a resistive circuit is

Select one of the following:

I = R/P
I = R/V
I = P/R
I = V/R

Explanation

Question 33 of 34

The total resistance of two resistors of 20 Ohms and 35 Ohms connected in series is

Select one of the following:

50 Ohms
45 Ohms
15 Ohms
55 Ohms

Explanation

Question 34 of 34

When an electric current flows through a conductor it

Select one of the following:

Cools down and expands
Cools down and contracts
Heats up and contracts
Heats up and expands

Explanation

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