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  • A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is (i) pushed into the coil,

Q. 13.     A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is

    (i) pushed into the coil

   (ii) withdrawn from inside the coil

    (iii) held stationary inside the coil?

Answers (1)

best_answer

(i)When a bar magnet is pushed into the coil, there is a relative motion between the magnetic field and the coil hence a current will get induced which will deflect the galvanometer. when the bar magnet is inside the coil and not moving, the flux won't change so the galvanometer won't show deflection. And hence Overall galvanometer will deflect momentarily.

(ii) When we withdraw the coil the deflection is opposite to the above deflection. The current is due to the relative motion between the bar magnet and the coil.

(iii) If a bar magnet is held stationary inside the coil, the flux through the coil is not changing with time and hence there won't be any induced current. therefore the galvanometer won't show any deflection.

Posted by

Pankaj Sanodiya

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