ES

Question 1

Definition of electric current

Answer 1

rate at which electric charge flows

Question 2

Definition of potential difference

Answer 2

amount of energy needed to move a unit charge from one point to another

Question 3

Definition of electrical resistance

Answer 3

measure of how much component opposes flow of electric current

Question 4

In a series circuit, as the number of resistors increase, the effective resistance ________

Answer 4

Increases

Question 5

What is the formula for total resistance in a series circuit

Answer 5

R=R1+R2+R3…Rn

Question 6

In a parallel circuit, as the number of resistors increase, the effective resistance _______

Answer 6

Decreases

Question 7

What is the formula for total resistance in a parallel circuit

Answer 7

1/R = 1/R1 + 1/R2 + 1/R3 … 1/Rn

Question 8

In a series circuit, the effective resistance decreases as the number of resistors ______

Answer 8

Decreases

Question 9

In a parallel circuit, the effective resistance increases as the number of resistors _________

Answer 9

Decreases

Question 10

Definition of power

Answer 10

rate of energy transfer

Question 11

Formula for power (watt)

Answer 11

Energy transferred (J)/ Time taken (S)

Question 12

How to convert watt to kilowatt

Answer 12

kWh = W/1000

Question 13

Colour of live wire

Answer 13

Brown

Question 14

Colour of neutral wire

Answer 14

Blue

Question 15

Colour of earth wire

Answer 15

green and yellow

Question 16

What is the function of a fuse

Answer 16

It is a safety device that prevents excessive current flow

Question 17

How does a fuse work

Answer 17

Any excessive current passing through the fuse will melt the wire. This creates an open circuit and switches off the appliance

Question 18

Name of a blue wire

Answer 18

Neutral wire

Question 19

Name of a brown wire

Answer 19

Live wire