Electrical Safety Devices

1. This device helps prevent electrical fires.

• A fuse

• A double insulator

• A receptacle cover

• A circuit breaker

The safety device shown here is

• An active wire

• A fuse

• An earth wire

• A double insulator

The primary purpose of the fuse is to prevent. What?

• fires caused by excessive electrical currents

• electrocution caused by excessive currents

• fires caused by sparking

• electrocution caused by excessive potential

  difference

A circuit breaker does the same job as a

• earth wire

• fuse

• switch

• AVR

Why is it important to use these electrical

safety devices at home?

• To make our home safe

• To lessen the consumption of electricity

• To protect people from fire and electrocution

• None of these

When the voltage is unstable, what device

should you use to stabilize the voltage input to

the appliances?

• Fuse

• Earthing

• Double Insulator

• Voltage Regulator

Tags

NGSS.MS-ETS1-4

The device is used to cover power

outlets

• 
• 
• 
• 

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4

What is a fuse?

• Another name for switch

• A protective device to slow down the

  current

• A wire with high resistance to prevent

  current from passing through

• A protective device for breaking an

  electric current

Earth wires work better when used in

conjunction with

• Circuit breaker

• Double Insulator

• Voltage Regulator

• Switch

Earthing and double insulation work in

similar ways, and that is to protect people

from electrocution or shock. Which device

is present in a hairdryer, iron, and electric

fan?

• Earth wire

• Double Insulation

• Both A and B

• Neither A nor B