A8.61-cm long solenoid consists of 677 turns of a 1.46-cm diameter circular coil. the total resistance of the coil is 0.684 \omegaω. calculate the energy stored in the magnetic field of the solenoid when 0.728 volts is applied across the solenoid leads. give your answer in units of millijoules.

The energy stored in the magnetic field of the solenoid is 0.633 mJ.

Explanation:

Given that,

Length = 8.61 cm

Number of turns = 677

Diameter = 1.46 cm

Resistance = 0.684 Ω

emf = 0.728 V

We need to calculate the energy stored in the magnetic field

Using formula of inductance

Where, N = number of turns

A= area

I = Current

Put the value into the formula

We need to calculate the current

Using ohm's law

We need to calculate the stored energy

Using formula of store energy

Put the value into the formula

Hence, The energy stored in the magnetic field of the solenoid is 0.633 mJ.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach