Free Printable Main Electricity

1.

AC stands for (a) current

2.

DC stands for (a) current

3.

The potential difference of mains electricity is (a) volts.

4.

Which type of current only flows in 1 direction around a circuit?

a)

Direct Current (DC)

b)

Alternating Current (AC)

5.

Which type of current goes back and forth in a circuit?

a)

Alternating Current (AC)

b)

Direct Current (DC)

6.

AC or DC?

a)

AC

b)

DC

7.

AC or DC?

a)

AC

b)

DC

8.

Which of these equations is correct?

a)

$frequency\ =\ \frac{1}{time\ period\ },\ f=\frac{1}{T}$

b)

$frequency\ =\ \frac{time\ period}{1},\ f=\frac{T}{1}$

c)

$frequency\ =\ time\ period\ \times\ 1$

d)

$frequency\ =\ time\ period\ +\ 1$

9.

The unit of frequency is ______

a)

Hertz (Hz)

b)

Seconds (s)

c)

Volts (V)

d)

Ohms ( $\Omega$ )

10.

Which number points to the Live Wire

a)

1

b)

2

c)

3

d)

4

e)

5

11.

Which number points to the Earth Wire

a)

1

b)

2

c)

3

d)

4

e)

5

12.

Which number points to the Fuse

a)

1

b)

2

c)

3

d)

4

e)

5

13.

Which number points to the Neutral Wire

a)

1

b)

2

c)

3

d)

4

e)

5

14.

Which of these descriptions best fits a fuse?

a)

When a high current surges, the resistance of the fuse wire causes it to heat up and melt, breaking the circuit.

b)

When a high current surges, the fuse detects a high temperature caused by resistance of the wire and using magnets, flips a switch breaking the circuit.

c)

When a high current surges, the fuse wire heats up starting a chemical reaction, breaking the circuit.

d)

When a high current surges, the fuse wire gets cold and freezes the electrons in the wire, making the current slow right down and breaks the circuit.

15.

Using the formula for Power, Potential Difference and Current.

What is the power of a lightbulb attached to a circuit running at 240V with a current of 0.25A

a)

60W

b)

960W

c)

0.001W

d)

240W

16.

The (a) wire carries the current away if there is a fault in the device

17.

In the national grid, the voltage is ________ using a _________ transformer before leaving the power station

a)

Increased - Step Up

b)

Increased - Step Down

c)

Decreased - Step Up

d)

Decreased - Step Down

18.

In the national grid, the voltage is ________ using a _________ transformer before reaching peoples homes

a)

Increased - Step Up

b)

Increased - Step Down

c)

Decreased - Step Up

d)

Decreased - Step Down

19.

Charge is measured in ___________

a)

Amps (A)

b)

Volts (V)

c)

Ohms ( $\Omega$ )

d)

Coulombs (C)

20.

Which of these is the correct formula for Charge, Energy and Potential Difference

a)

$E\ =\ QV$

b)

$E=\ \frac{V}{Q}$

c)

$E=\frac{Q}{V}$

d)

$E\ =\ Q+V$

Main Electricity

Total questions: 20

Worksheet time: 12mins

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