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Byju's Answer

Standard IX

Physics

Domestic Circuits

Given are the...

Question

Given are the melting point of three materials, which material do you think will be suitable for being used as connecting wire, fuse and filament respectively?
Material I: $400^{\circ} C$
Material II: $1200^{\circ} C$
Material III: $3400^{\circ} C$

Material I – Connecting Wire
Material II – Fuse
Material III - Filament

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Material I –Filament
Material II – Fuse
Material III –Connecting Wire

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Material I - Filament
Material II - Connecting Wire
Material III - Fuse

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Material I –Fuse
Material II – Connecting Wire
Material III - Filament

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Solution

The correct option is D Material I –Fuse
Material II – Connecting Wire
Material III - Filament
Filament has the highest melting point as it has to glow after getting heated by electric current.
Fuse has the lowest melting point so that it can melt before any other wire or appliance and protect other appliances in the circuit.
Connecting wires have moderate melting points as they have to transfer the current to the appliances, without melting and low energy loss.

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Similar questions

Q. Give reason for the following :
(i) Why are copper and aluminium wires used as connecting wires ?
(ii) Why is tungsten used for filaments of electric lamps ?
(iii) Why is lead-tin alloy used for fuse wires ?

Question 11.
Common salt besides being used in kitchen can also be used as the raw material for making
(i) washing soda
(ii) bleaching powder
(iii) baking soda
(iv) slaked lime

Choose the correct option from the following:
(a) (i) and (ii)
(b) (i), (ii) and (iv)
(c) (i) and (iii)
(d) (i), (iii) and (iv)

Question 11.
Common salt besides being used in kitchen can also be used as the raw material for making
(i) washing soda
(ii) bleaching powder
(iii) baking soda
(iv) slaked lime

Choose the correct option from the following:
(a) (i) and (ii)
(b) (i), (ii) and (iv)
(c) (i) and (iii)
(d) (i), (iii) and (iv)

You are provided with the following materials:

(i) Magnifying glass

(ii) Mirror

(iii) Stainless steel plate

(iv) Glass tumbler

Which of the above materials will you identify as transparent?

(a) (i) and (ii) (b) (i) and (iii) (c) (i) and (iv) (d) (iii) and (iv)

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.

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Given are the melting point of three materials, which material do you think will be suitable for being used as connecting wire, fuse and filament respectively? Material I: 400∘C Material II: 1200∘C Material III: 3400∘C

Given are the melting point of three materials, which material do you think will be suitable for being used as connecting wire, fuse and filament respectively?
Material I: $400^{\circ} C$
Material II: $1200^{\circ} C$
Material III: $3400^{\circ} C$