Question

Two 10 cm long, straight wires, each carrying a current of 5A are kept parallel to each other. If each wire experienced a force of 10^-5 N, then separation between the wires is ______cm.

पर्याय

• 5

• 6

• 7

• 8

Answer 1

Two 10 cm long, straight wires, each carrying a current of 5A are kept parallel to each other. If each wire experienced a force of 10^-5 N, then separation between the wires is 5 cm.

Explanation:

We have

`"F"/"l"=mu_0/(2pi)("i"_1"i"_2)/"r"`

⇒ r = `mu_0/(2pi)"i"_1"i"_2xx"l"/"F"`

⇒ r = 2 × 10^-7 × 25 × `0.1/10^-5` 

= 50 × 10^-7 × 10⁴ 

= 50 × 10^-3 m

= 5 cm