why is electromagnetic induction so called?
A coil to sensitive galvanometer is held stationary.A bar magnet with its North pole facting coil is moving towards the coil at a certain speed. The galvanometer needle shows deflection of 10 divisions towards right of the center of the scale.How will the reading on the galvanometer scale be affected if the south pole of the bar magnet facing the coil is moved away at the same speed?

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Solution

$W h e n e v e r t h e m a g n e t i c f l u x l i n k e d w i t h c i r c u i t c h a n g e s a n i n d u c e d e m f i s s e t u p i n c i r c u i t w h o s e m a g n i t u d e a t a n y i n s \tan t i s p r o p o t i o n a l t o r a t e o f c h a n g e o f m a g n e t i c f l u x . e = \frac{d ϕ}{d t} I t w i l l s h o w d e f l e c t i o n t o w a r d s l e f t .$

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Similar questions

Q. A student connects a coil of insulated wire to a galvanometer. What would be seen if a bar magnet with its north pole towards one face of the coil is:
(a) moved quickly towards it?
(b) moved quickly away from the coil?
(c) placed near the face of the coil?
Name the phenomenon involved.

A coil of insulated wire is connected to a galvanometer. What would be seen if a bar magnet with its south pole towards one face of the coil is moved quickly toward and away from it.

The given figure shows a coil connected to a centre zero galvanometer G. The galvanometer shows a deflection to the right when the N-pole of a powerful magnet is moved to the right as shown.

What will be the observation in G when both the coil and the magnet are moved to the right at the same speed?

Q. A coil of insulated copper wire is connected to a galvanometer. If a bar magnet is held stationary inside the coil then there will be ___ deflection in the galvanometer.

(a) A coil of insulated wire is connected to a galvanometer. What would be seen if a bar magnet with its south pole towards one face of the coil is
(i) moved quickly toward it

(ii) moved quickly away from it

(iii)placed near its one face.

These activities are then repeated with north pole of the magnet. What will be the observations?

(b) Name and define the phenomenon involved in above activities.

(c) Name the rule which can determine the direction of current in each case.

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Whenever the magnetic flux linked with circuit changes an induced emf is set up in circuit whose magnitude at any instant is propotional to rate of change of magnetic flux.e=dϕdtIt will show deflection towards left.