Question

Two circular coils are made of two identical wires of same length and carry same current. If the number of turns of the two coils are 4 and 2, then the ratio of magnetic induction at the centres will be_________.​

Answer 1

Answer:

48

Explanation:

sorry my anser is tucca

Answer 2

Formula To Find:

$Bα \frac{n}{r}$

Now wires have same length

So,

So, n12πr1 = n2×2πr2

4 x r1 = 2 x r2

r1/r2 = 1/2

B1/B2 = n1/r1/n2/r2

B1/B2 = 4 x 2/ 2 x 1

= 4/1 = 4:1