In each of the two coils the rate change of the magnetic flux in a single loop is the same. The emf induced in coil 1 is 1.23 V. The emf inducted in the second coil 2, which has 234 loops, is 4.56 V. How many loops are there in the first coil

The number of loops in first coil is 64

Explanation:

Given :

Induced emf in first coil 1.23 V

Induced emf in second coil 4.56 V

No. loops in second coil

We have to find no. loops in first coil

Apply faraday's law to each coil,

Now compare above equation,

So loops in first coil is,

  ≅ 64

Therefore, the number of loops in first coil is 64

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.