Home
Class 12
PHYSICS
A wire in the form of a circular loop of...

A wire in the form of a circular loop of radius `10 cm` lies in a plane normal to a magnetic field of `100 T`. If this wire is pulled to take a square shape in the same plane in `0.1 s`, find the average induced emf in the loop.

A

6.70 volt

B

5.80 volt

C

6.75 volt

D

5.75 volt

Text Solution

Verified by Experts

The correct Answer is:
3
According to Faraday.s law of electromagneticinduction
`E_(innuced)=(-trianglephi)/(trianglet)=B((A_(f-A_(i))))/(trianglet)`Letr be the radius of circle, then side of square formed =`(2pir)/(4)=(pi)//(2)`Change is area of loop =`A_(i)-A_(f)=pir^(2)((pir)/(2))^(2)=)pi(4-pi)r^(2))/(4)`
Hence averag
Promotional Banner

Similar Questions

Explore conceptually related problems

A wire of length l in the from of a circular loop lies in a plane normal to a magnetic firld B_(0) . If this wire is converted into a square loop in time t_(0) , find the average induced emf.

A wire of length l in the form of a square loop lies in a plane normal to a magnetic field B_(0) . If this wire is converted into a circular loop in time, then find the average induced emf.

A circular wire loop of radius r lies in a uniform magnetic field B, with its plane perpendicular to magnetic field. If the loop is deformed to a square shape in the same plane in time t, the emf induced in the loop is

A given wire is bent into a circular loop of radius 7cm and is placed perpendicular to a magnetic field of 1.0T .Within 0.1 second ,the loop is changed to a 100cm square and the field increases to 1.8T .The induced emf in the coil will be

A conducintg circular loop having a redius of 5.0cm, is placed perpendicular to a magnetic field of 0.50 T. It is removed from the field in 0.50 s. Find the average emf produced In the loop during this time.

The figure shows a uniform, 3.0 T magnetic field that is normal to the plane of a conducting, circular loop with a resistance of 1.5 Omega and a radius of 0.024 m. The magnetic field is directed out of the paper as shown . Note: The area of the non-circular portion of the wire is considered negligible compared to that of the circular loop. If the magnetic field is held constant at 3.0 T and the loop is pulled out of the region that contains the field in 0.2 s, what is the magnitude of the average induced emf in the loop?

A square loop of side 44 cm is changed to a circle in time 0.5 sec with its plane normal to a magnetic field 0.6 T. The emf induced is

A square loop of side 22 cm is changed to a circle in time 0.4 sec with its plane normal to a magnetic field 0.2 T . The emf induced is

A circular loop of radius 0*2m carrying a current of 1A is placed in a uniform magnetic field of 0*5T . The magnetic field is perpendicular to the plane of the loop. What is the force experienced by the loop?

A conducing circular loop is placed in a uniform magnetic field of 0.02 T, woth its plane perpendicular to the field. If the redius of the loop starts shrinking at a constant rate of 1.0 mm//s , then find the emf induced in the loop, at the instant when radius is 4 cm.