Question

Two parallel conductors carrying unequal currents in the same direction  ______.

विकल्प

• neither attract nor repel each other

• repel each other

• attract each other

• will have rotational motion.

Answer 1

Two parallel conductors carrying unequal currents in the same direction attract each other.

Explanation:

Two wires 1 and 2 carrying currents i₁ and i₂ respectively are shown in the figure given below,

Force on wire 2 due to B₁ (field of wire 1) is given by 

F₂ = i₂lB₁

Using right hand screw rule, direction of F₂ would be towards wire 1.

Similarly, force on wire due to B₂ (field of wire 2)

F₁ = i₁lB₂ 

Again, by using right hand screw rule,

direction of F₁ would be towards wire 2.

If two parallel conductors carry (equal or unequal) current in the same direction, they will exerted force towards each other i.e., they will be attract each other.