Field at the centre of a circular coil when turns, radius or current change

1. A.
   $\frac{5}{2}$
2. B.
   $\frac{25}{4}$
3. C.
   $\frac{5}{4}$
4. D.
   $\frac{25}{2}$

Tap an option to check your answer.

1. A.
   $1:1$
2. B.
   $1:2$
3. C.
   $2:1$
4. D.
   $4:1$

Tap an option to check your answer.

1. A.
   $16\text{ }T$
2. B.
   $2\text{ }T$
3. C.
   $8\text{ }T$
4. D.
   $4\text{ }T$

Tap an option to check your answer.

1. A.
   $n:N$
2. B.
   $n^{2}:N^{2}$
3. C.
   $N^{2}:n^{2}$
4. D.
   $N:n$

Tap an option to check your answer.