Question

Q(1). A straight wire of diameter 0.5 my carrying a current of 1 A is replaced by another wire of imm
diameter carrying same current. The magnetic field at the same distance from the wire is
(a) Twice
(b) one half
(c) one forth
(d) no change.​

Answer 1

Answer:

magnetic field due to straight wire carrying current i at distance x is given as

B=

2πx

μ

0

i

so B does not depends on the diameter of wire.

B is unchanged

Explanation:

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