CBSE Class 12 Physics 2023 Delhi Set 1 Paper

Question : 2

Total: 35

Two long parallel wires kept 2m apart carry 3A current each, in the same direction. The force per unit length on one wire due to the other is

Solution: 👈: Video Solution

i1‌=i2=3A
r‌=2m
F∕l‌=‌

µ0

2π

×‌

i2i2

‌‌[‌

µ0

2π

=2×10−7NA−2]‌
Or, F∕l‌=2×10−7×‌

3×3

∴ F∕l‌=9×10−7N
Force per unit length =9.0×10−7N∕m
Since, the currents are in same direction so there would be an attractive force between them.

Go to Question:

Prev Question

Next Question