Question

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Refer to the diagram. A magnet is moved into a coil that is connected to a galvanometer. Explain how applying Lenz’s law helps determine the direction of the induced emf in the coil. What is the direction of the induced emf in the coil? Explain how the direction can be verified using the second right-hand rule.

Answer 1

when we push the bar magnet towards the coil, a magnetic field produces in the coil also, which oppose the bar magnet. The side of bar magnet is "N", then the the end of the coil before the "north" of the coil is also "north".

Answer 2

A correction... Lenz's law refers to induced currents and not to induced emf.

Answer 3

Let us apply the Lenz's law to the coil in which current is indced by the movement of a bar magnet. we know that a current carrying coil produces a magnetic field similar to that of a bar magnet. one face of the coil acts as the north pole while the other one as the south pole. if the coil is tooppose the motion of the bar magnet, the face of the coil towards the magnet must become a north pole. the two north magnet must become a north pole. as shown in the diagram. the two north poles repel each other. the right hand rule applied to to the coil suggest that the induced current must be anti clock wise.

Answer 4

Right hand rule is: Hold the solenoid in the right hand with thumb in the direction of the magnetic field produced in the coil, the curling fingers show the direction of induced current.

Answer 5

SO according to your diagram the direction of induced current is anti clock wise

Answer 6

are you like a physics expert or something?

Answer 7

I am student and doing masters in physics.

Answer 8

well this is helping a lot, thanks so much.

Answer 9

The answer of your 2nd part of the question. we have to verify our first answer.
2nd Right hand rule is...... " hold the solenoid in the right hand with fingers curling in the directon of the current, the thumb will point the direction of the current"

Answer 10

most welcome... and it is the inverse of the first right hand rule you can say....

Answer 11

Any confusion???

Answer 12

Welcome sir @PsiSquared

Answer 13

no im just reading over it

Answer 14

okay good...

Answer 15

i got it now, thanks again.

Answer 16

Its my pleasure.. :)

Answer 17

@kbri29 Hope this helps!!