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Science · 2026 · 5 marks
CBSE 2026 · Region 5 · Set 2 · Q39
(i)List any two features of the electric current used in the houses of India.(ii)Write any two differences between direct current and an alternating current.(iii)How will you identify live wire and neutral wire in a domestic electric circuit ?(i)Why is fuse an important component in our electric circuits ?(ii)Distinguish between overloading and short-circuiting of a circuit.(iii)Giving reason explain what type of materials are used in fuse wires. { } $\displaystyle 1191$-2Page $\displaystyle 32$ of $\displaystyle 32$
(i)
List any two features of the electric current used in the houses of India.
(ii)
Write any two differences between direct current and an alternating current.
(iii)
How will you identify live wire and neutral wire in a domestic electric circuit ?
(i)
Why is fuse an important component in our electric circuits ?
(ii)
Distinguish between overloading and short-circuiting of a circuit.
(iii)
Giving reason explain what type of materials are used in fuse wires. { } $\displaystyle 1191$-2Page $\displaystyle 32$ of $\displaystyle 32$
Marking-scheme solution
(i)
Features
Direction of current changes periodically/ alternating current.
Frequency of current supplied in our houses is $\displaystyle 50$ Hz.
(ii)
| Direct current | Alternating current | ||
| (I) | Flows in one direction | (I) Reverses its direction periodically. | |
| (II) | Sources : Cell / battery | (II) plant |
(iii)
Live wire has red insulation cover and neutral wire has black insulation cover.
(i)
Because it is a safety device, which prevents the damage to electric appliances and circuit caused due to overloading.
(ii)
| Over loading | Short circuiting |
| It is caused when too many appliances are connected to a single socket./ Due to accidental hike in the supply voltage. | It is caused due to direct contact of live wire with the neutral wire. |
(iii)
A piece of wire made of a metal or an alloy.
appropriate (low) melting point.
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CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.