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

Result for 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

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

Result for 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.