EASY
10th ICSE
IMPORTANT
Earn 100
What do you mean by the term local earthing ? Explain how it is done.
Important Questions on Electrical Power and Household Circuits
EASY
10th ICSE
IMPORTANT
The metal case of an electric appliance is earthed. Explain the reason.
EASY
10th ICSE
IMPORTANT
The earthing of an electric appliance is useful only if the fuse is in the live wire. Explain the reason. Name the part of the appliance which is earthed.
EASY
10th ICSE
IMPORTANT
For earthing an electrical appliance, one has to remove the paint from the metal body of the appliance where the electrical contact is made. Explain the reason.
EASY
10th ICSE
IMPORTANT
What is the colour code for the insulation on the live wire, neutral wire and earth wire?
EASY
10th ICSE
IMPORTANT
A power circuit uses a cable having three different wires.
(a) Name the three wires of the cable.
(b) To which of the two wires should the heating element of an electric geyser be connected?
(c) To which wire should the metal case of the geyser be connected?
(d) To which wire should the switch and fuse be connected?
MEDIUM
10th ICSE
IMPORTANT
State two circumstances when one may get an electric shock from an electrical gadget. What preventive measure must be provided with the gadget to avoid it?
EASY
10th ICSE
IMPORTANT
Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit?
EASY
10th ICSE
IMPORTANT
Give two characteristic of a high tension wire.
