00:01
Hi, here in this given problem, the first question question number 24, it is having a wire, a horizontal wire, carrying current towards right, current i, the compass box kept over here.
00:23
Now the direction of magnetic field above the conductor, that is to the bottom of the page, which is using right hand thumb rule.
01:18
So here option d is correct.
01:24
The direction of compass needle that will also be in downward direction.
01:30
So we can say option d is correct here.
01:40
Then in the second question, question number 25, there is a bar magnet, first of all, having north pole above the south pole and there is a loop allowed to fall towards the north pole.
02:04
So as the loop, as the coil is falling down towards north, so as per lens is law, the direction of current induced will be such that it should oppose.
03:07
The downward motion of the coil.
03:17
So we can say bottom phase of the coil should also acquire north polarity because north will be repelled by north pole.
03:43
Means its upper face it should have become south pole.
04:03
That's why we conclude the direction of current induced in the upper face that should be clockwise.
04:27
So here option b is correct.
04:32
Now in the third question in the same problem...