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Standard VI

Physics

Electric Bulb and Its Working

All wires use...

Question

All wires used in electric circuits should be covered with

a coloured material

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an insulating material

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a conducting material

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none of these

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Solution

The correct option is B an insulating material
he most important reason why electrical wires are covered in insulating material is to protect people from electrical shock, and protection from short circuit.

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Similar questions

Q. Why are the electric wires used in homes covered with materials like plastic or rubber?

Question 33
Electrical wires have a coating of an insulating material. The material, generally used is
(a) Sulphur
(b) Graphite
(c) PVC
(d) All can be used

Select the correct alternative:

(a) All wires used in electric circuits should be covered with:

(i) colouring material

(ii) conducting material

(iii) an insulting material

(iv) none of the above.

(b) Electrical work done per unit time is:

(i) electrical energy

(ii) electric current

(iii) electric voltage

(iv) electric power

(i) 100 watt (ii) 1000 watt

(iii) 10 watt (iv) none of the these.

(d) Fuse wire is an alloy of :

(i) tin-lead (ii) copper-lead

(iii) tin-copper (iv) lead-silver

(e) A fuse wire should have :

(i) a low melting point

(ii) high melting point

(iii) very high melting point

(iv) none of the above.

(f) When the switch of an electric appliance is put off, it disconnects:

(i) the live wire

(ii) the neutral wire

(iii) the earth wire

(iv) the live and the neutral wires.

(g) The purpose of an electric meter in a house is :

(i) to give the cost of electricity directly

(ii) to give the consumption of electrical energy

(iii) to safeguard the circuit from short circuiting

(iv) to put on or off the mains.

(h) If out of the two lighted bulbs in a room, one bulb suddenly fuses, then:

(i) other bulb will glow more

(ii) other bulb will glow less

(iii) other bulb will also fuse

(iv) other bulb will remain lighted unaffected.

Q. Electrical wires have a coating of an insulated material. The material generally used is:

Question 33
Electrical wires have a coating of an insulating material. The material, generally used is
(a) Sulphur
(b) Graphite
(c) PVC
(d) All can be used

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All wires used in electric circuits should be covered with

The correct option is B an insulating materialhe most important reason why electrical wires are covered in insulating material is to protect people from electrical shock, and protection from short circuit.

The correct option is B an insulating material
he most important reason why electrical wires are covered in insulating material is to protect people from electrical shock, and protection from short circuit.