Home
Class 12
PHYSICS
A circular coil of 60 turns and radius 4...

A circular coil of 60 turns and radius 4 cm carries current of 1 A . How much work will be done in rotating the coil through `90^(@)` . It is suspended freely in uniform magnetic field `0.2 T`.

Text Solution

Verified by Experts

`M =NiA`
` = 60 xx 1 xx pi xx (0.04) ^(2)`
`= 60 pi xx 16 xx 10 ^(-4)`
` = 960 xx 10 ^(-4) pi`
`= 0.096 pi Am^(2)`
`W = MB (cos theta _(1) - cos theta _(2))`
`theta_(1) = 0^(@) , theta _(2) =90^(@)`
`W = 0.096 pi xx 0.2 xx (cos 0^(@) - cos 90^(@))`
`=.096 pi xx 0.2J`
`= 0.06J`
Promotional Banner

Similar Questions

Explore conceptually related problems

A circular coil of n turns and radius r carries a current I. The magnetic field at the center is

A circular coil of 30 turns and radius 15 cm carries a current of 5 A. Calculate the net torque on the coil when it is placed in a uniform magnetic field of 0.2 T normal to the plane of coil. Also calculate the net force on the coil.

A circular coil of radius 1*5cm carries a current of 1*5A . If the coil has 25 turns , find the magnetic field at the centre.

No net force acts on a rectangular coil carrying a steady current when suspended freely in a uniform magnetic field.

A circular coil of 100 turns and having an effective radius of 5cm carries a current of 0*1 ampere. How much work is required to turn it in an external magnetic field of 1*5 weber//m^2 through 180^@ about an axis perpendicular to magnetic field. The plane of the coil is initially perpendicular to the magnetic field.

A circular coil of 100 turns has an effective radius of 0.05 m and carries a current of 0.1 A. How much work is required to turn it in an external magnetic field of 1.5 Wb m^-2 through 180^@ about an axis perpendicular to the magnetic field. The plane of the coil is initially perpendicular to the magnetic field.

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is

A coil of 50 turns and 4cm radius carries 2A current then magnetic field at its centre is :- ?

A circular coil of 100 turns and having a radius of 0*05m carries a current of 0*1A . Calculate the work required to turn the coil in an external magnetic field of 1*5T through 180^@ about an axis perpendicular to the magnetic field. The plane of the coil is initially at right angles to the magnetic field.

A 200 turn closely wound circular coil of radius 15 cm carries a current of 4 A. The magnetic moment of this coil is