The diagram shows a fixed coil of several turns connected to a centre zero galvanometer G and a magnet NS which can move in the direction shown in the diagram.

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Class 10 | Electro Magnetism | ICSE | Physics | Selina

The diagram shows a fixed coil of several turns connected to a centre zero galvanometer G and a magnet NS which can move in the direction shown in the diagram.

(a)Describe the observation in the galvanometer if (i) the magnet is moved away rapidly, (ii) the magnet is kept stationary after it has moved into the coil, (iii) the magnet is then rapidly pulled out of the coil.

(b) How would the observation in (i) of part (a) change if a more powerful magnet is used?

Solution:

(a) If the magnet is swiftly moved away from the galvanometer, the direction of deflection remains constant.

(ii) If the magnet is kept fixed after it has travelled within the coil, the deflection becomes zero.

(iii) If the magnet is swiftly pushed out of the coil, the deflection occurs again in the opposite direction.

(b) The angle of deflection is widened.

i

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