Awire carries 3.7 a of current. a second wire is placed parallel to the first 8.0 cm away. what is the current flowing through the second wire if the magnitude of the wires is zero at a distance 3.4 cm from the first wire. o 11 a 5.0a o 5.7a o 3.7a

The current in second wire is 5.0 A.

(B) is correct option.

Explanation:

Given that,

Current in first wire = 3.7 A

Distance = 8.0 cm

We need to calculate the magnetic field due to the current carrying wire

Using formula of magnetic field

Where, I = current

r = distance

Put the value into the formula

For first wire

...(I)

For second wire,

The distance is 8-3.7 =  4.3 cm

...(II)

The magnetic field in both the wires,

From equation (I) and (II)

Hence, The current in second wire is 5.0 A.

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