Two long straight parallel wires are separated by 7.0cm. there is a 2.0a current flowing in the first wire. if the magnetic field strength is zero at a distance of 2.2cm from the first wire, then what is the magnitude and diretion of the current in the second wire?

The current in the second wire is 4.4 A.

Explanation:

Given that,

Distance =7.0 cm

Current in first wire = 2.0 A

The magnetic field strength is zero at distance of 2.2 cm from the first wire.

We need to calculate the current in the second wire

Using formula of magnetic field

Here,

Put the value into the formula

Hence, The current in the second wire is 4.4 A.

1/0.14nm = 10^10/1.4 a lot