Question

On a circular path of radius 9 cm in air around a solenoid with increasing magnetic field, the emf is 28 volts. A wire with resistance 7 ohms is placed along the path. What is the current in the wire

Answer 1

Answer:

Current in the wire, I = 4 A

Explanation:

It is given that,

Radius of the circular path, r = 9 cm = 0.09 m

EMF of the solenoid, E = 28 volts

Resistance of the wire, R = 7 ohms

We need to find the current in the wire. It can be calculated using the Ohm's law. Its mathematical relation is given by :

$E=IR$

$I=\dfrac{E}{R}$

$I=\dfrac{28\ V}{7\ \Omega}$

I = 4 A

So, the current in the wire is 4 A. Hence, this is the required solution.