Home
Class 12
PHYSICS
A square- shaped copper coil has edges o...

A square- shaped copper coil has edges of length 50cm and contains 50 turns. It is placed perpendicular to 1.0 T magnetic field. It is removed form the magnetic field in 0.25 s and restored in its joriginal place in the next 0.25 s. Find the magnitude of the average emf induced in the loop during (a) its removal, (b) its restoration and (c) its motion.

Text Solution

Verified by Experts

No. of turns = 50 area of square = 0.25 `m^(2)`
Magnit of magnetic field = 1 T
(a) Average rate of complete removal `= Deltas //Deltat =1 m//s^(2)`
`:.` average induced emf =` NB"" (DeltaS)/(Deltat)` = 50 volt
(b) Average rate of complete restoration =` Delta s//Delta t=1 m//s^(2)`
`:.` average induced emf = `NB(DeltaS)/(Deltat) = 50` volt
(c ) For entire motion in the field `Delta S= 0`
`:.` average induced emf `= NB(DeltaS)/(Deltat)=` 0 volt
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    FIITJEE|Exercise SOLVED PROBLEMS ( SUBJECTIVE)|10 Videos

  • ELECTROMAGNETIC INDUCTION

    FIITJEE|Exercise SOLVED PROBLEMS ( OBJECTIVE)|15 Videos

  • ELASTICITY AND WAVES

    FIITJEE|Exercise Assignment Problems (Objective) Level-II|15 Videos

  • ELECTROMAGNETIC INDUCTION AND AC CURRENT

    FIITJEE|Exercise Example|15 Videos

Similar Questions

Explore conceptually related problems

A metallic ring of area 25 cm^(2) is placed perpendicular to a magnetic field of 0.2 T .Its is removed from the field in 0.2 s .Find the average emf produced in the ring during this time.

A 50 turn coil with an average diameter of 0.04 m is placed perpendicular to a magnetic field of 5000 T. If the magnetic field is changed to 2000 T in 5 s, find the magnitude of the induced emf.

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.

A 70 turn coil with average diameter of 0.02 m is placed perpendicular to magnetic field of 9000 T. If the magnetic field is changed to 6000 T is 3s, what is the magnitude of induced emf ?

Suppose the resistance of the coil in the previous problem is 25Omega . Assume that the coil moves with uniform velocity during its removal and restoration. Find the thermal energy developed in the coil during (a) its removal, (b) its restoration and (c) its motion.

A rectangular coil of 100 turns and size 0.1mxx0.05m is placed perpendicular to a magnetic field of 0.1 T. If the field drops to 0.05 T in 0.05 s, the magnitude of the emf induced in the coil is

A coil with an average diameter of 0.02 m is placed perpendicular to a magnetic field of 6000 T. If the induced e.m.f. is 11 V when magnetic field is changed to 1000 T in 4 s, what is the number of turns in the coil ?

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 rectangular coil of 25 turns, area of 25cm^(2) and resistance of 4 ohm//turn is placed perpendicular to a varying magnetic field, which changes at the rate of 500 T//s . The induced current in the coil is

A magnetic field of flux density 10 T acts normal to a cail of 50 turns having 100 cm ^(2) area. Find the emf induced, if the coil is removed from the magnetic field in 0.1 s.