Question

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Answer 1

Answer:

1. ELECTTRIC FUSE

2. Increase 'in the number of cells will further increase the deflection in magnetic compass. You are provided with a magnetic compass, an empty matchbox, a battery of two cells and connecting wires.

3. When the distance of the magnetic needle is increased the deflection of the magnetic needle decreased. Thus the strength of a magnetic field at a point created by the current-carrying conductor depends on the distance of the point from the conductor.

4. As a result when they interact with each other there will be deflection seen in the magnetic needle. When the current is switched off, there is no magnetic field produced by the wire, magnetic needle does not deflect from its north-south position.

5. Cranes use powerful electromagnets to move metallic objects. An electric bell uses electromagnets to produce sound. An induction motor also uses the magnetic effect of current.

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