10.10

Question 1

Direct current

Answer 1

electric current that flows in one direction only

Question 2

Alternating current

Answer 2

current that changes direction along a wire a number of times per second. The alternating current (AC) supplied to homes changes direction 50 times every second

Question 3

Main switch

Answer 3

control switch that turns all the household circuits on or off

Question 4

Earth socket

Answer 4

connection that provides a route for current to flow to the ground when an electrical appliance malfunctions. It is a safety device that helps to avoid the flow of current through a person using the appliance

Question 5

Transformer

Answer 5

device that can increase or decrease voltages for alternating current

Question 6

Rectifier

Answer 6

device that changes alternating current to direct current

Question 7

Fuse

Answer 7

safety wire that melts when too much current flows through it. Fuse wires are designed to melt at different currents

Question 8

Circuit breaker

Answer 8

safety device that breaks a circuit if the current suddenly exceeds a specified size. Circuit breakers can be reset