NCERT Class VI Science Solutions: Chapter 12 – Electricity and Circuits Part 4

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Question 15:

Paheli connected two bulbs to a cell as shown in Fig.

Result for connected two bulbs to a cell

Connected Two Bulbs to a Cell

She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.

Answer:

No, the bulb A will not glow in the circuit because the filament of the bulb B is broken and the current will not pass through it; the circuit is broken or incomplete. Therefore, the current will not flow in the whole circuit.

Image of two bulb in series

Image of Two Bulb in Series

Question 16:

Why do bulbs have two terminals?

Answer:

Bulb has two terminals to connect the filament with the circuit so that the current can pass through it.

Question 17:

Which of the following arrangement A, B, C and D given in Fig, should not be set up? Explain, why.

Result for Bulb in connected battery

Bulb in Connected Battery

Answer:

Arrangement A is not desirable and should not he set up. This will exhaust the cell very quickly.

Question 18:

A fused bulb does not glow. Why?

Answer:

In a fused bulb the filament is broken and the circuit is incomplete.

Question 19:

Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed? Explain, how?

Answer:

Yes. Aluminium foils can act as connecting wires.

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