Question

4. Two solenoids having lengths L and 2L and the number of loops N and 4N, both have the same current,
then the ratio of the magnetic field will be:
(a) 1:2
(b) 2:1
(c) 1:4
(d) 4:1​

Answer 1

Answer:

Two solenoids having lengths L and 2L and the number of loops N and 4N, both have the same current,

then the ratio of the magnetic field will be:

(a) 1:2

(b) 2:1

(c) 1:4

(d) 4:1