A coil lies on a horizontal plane and the south pole of the magnet is thrust int

Question

A coil lies on a horizontal plane and the south pole of the magnet is thrust into the coil with a quick movement in the direction shown in the diagram below.

Find the direction of the induced current in the coil, when looking down on the coil from above, by answering the following questions.

(a) What is the direction of the magnetic field due to the magnet in the center of the coil?

+xx    +yy+zz

(b) As the magnet is moved in the direction indicated, how will the magnetic flux in the coil change?

increasedecrease    remain the same

(c) What is the direction of the induced magnetic flux in the coil?

+xx    +yy+zz

(d) What is the direction of the induced current in the coil when viewed from above the coil?

clockwisecounterclockwise    no current

Explanation / Answer

here,

a)

as the south pole is going near to the coil,

the direction of the magnetic feild in the centre of coil is + y direction

b)

as the magnetic is going closer

the magnetic flux in the coil increases

c)

the induced magnetic flux will oppose the direction of the magnetic flux due to the magnet

therefore,

the induced magnetic flux is in -y direction

d)

using right hand thumb rule,

the direction of the induced current is clockwise

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