Awire of resistance 7 ohms and length 2.8 m is bent into a circle and is concentric with a solenoid in which the magnetic flux changes from 6 t·m2 to 4 t·m2 in 0.2 seconds. what is the emf in the wire? v what is the non-coulomb electric field in the wire? v/m what is the current in the wire?

The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.

Explanation:

Given that,

Resistance = 7 ohms

Length = 2.8 m

Time t =0.2

We need to calculate the change in magnetic flux

Using formula of induced emf

Put the value into the formula

We need to calculate the electric field in the wire

Using formula of electric field

We need to calculate the current in the wire,

Using formula of ohm's law

Put the value into the formula

Hence, The emf, electric field and the current in the wire are 10 V, 3.57 V/m and 1.43 A.