Home
Class 12
PHYSICS
Suppose the loop in above question is st...

Suppose the loop in above question is stationary, but the current feeding the electromagnet produces the magnetic field is gradually reduced so that the field decreases form its initial value of 0.03 T at the rate of 0.02 `T//sec`. If the cut is joined and loop has a resistance of `1.6 Omega`, how much power is dissipated by the loop as heat ?

Text Solution

Verified by Experts

Here ν = 0.5 Hz, N =100, A = 0.1 `m^2` and B = 0.01 T. Employing Eq.
Eq. (6.21)
`epsi_0 = NBA (2pi v)`
`=100xx 0.01xx0.1xx2xx3.14xx0.5`
`=0.314V`
The maximum voltage is 0.314 V
We urge you to explore such alternative possibilities for power generation.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    NCERT BANGLISH|Exercise EXERCISES|10 Videos

  • ELECTROMAGNETIC INDUCTION

    NCERT BANGLISH|Exercise ADDITIONAL EXERCISES|7 Videos

  • ELECTRIC CHARGES AND FIELDS

    NCERT BANGLISH|Exercise EXERCISES|29 Videos

  • ELECTROMAGNETIC WAVES

    NCERT BANGLISH|Exercise ADDITIONAL EXERCISES|5 Videos

Similar Questions

Explore conceptually related problems

A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the loop. What is the mef developed across the cut if the velocity of the loop is 1 m. s^(-1) in a direction normal to the Suppose in this case the loop is stationary but the current feeding the electromagnet produces the magnetic field is gradually reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T. s^(-1) . If the cut is joined and the loop has a resistance of 1.6 Omega , how much power is dissipated by the loop as heat? What is the source of this power?

A square loop of wire of side 10 cm is placed at angle of 45^(@) with a magnetic field that changes uniformly from 0.2 T to zero in 1 second. Find the current induced in the loop of resistance 1 Omega .

The magnetic flux across a loop of resistance 10Omega is given by phi = 5t^2 -4t +1 induced in the loop after 0.2 sec ?

A square wire loop of side 10 cm is placed at an angle of 45^(@) with a magnetic field that changes uniformly from 0.1 T to zero in 0.7 s. If resistance of the loop is 1 Omega , then the induced current in it is

A metal rod PQ is resting on the rails A'B' and positioned between the poles of a permanent magnet. The rails, the rod and the magnetic field are in three mutually perpendicular directions. A galvanometer G connects the rails through a switch K. Length of the rod = 15 cm, B = 0.50 T, resistance of the closed loop containing the rod = 9.0 mOmega . Assume the field to be uniform. How much power is required by an external agent to keep the rod moving at the same speed (=12cm.s^(-1)) when K is closed? How much power is required when K is open?

A metal rod PQ is resting on the rails A'B' and positioned between the poles of a permanent magnet. The rails, the rod and the magnetic field are in three mutually perpendicular directions. A galvanometer G connects the rails through a switch K. Length of the rod = 15 cm, B = 0.50 T, resistance of the closed loop containing the rod = 9.0 mOmega . Assume the field to be uniform. Suppose K is open and the rod is moved with a speed of 12 cm. s^(-1) in the direction shown. Give the polarity and magnitude of the induced emf.

A circular coil of radius 8.0 cm and 20 turns rotates about its vertical diameter with an angular speed of 50 rad. s^(-1) in a uniform horizontal magnetic field of magnitude 3.0xx10^(-2)T . Obtain the maximum and average emf induced in the coil. If the coil forms a closed loop of resistance 10 Omega , calculate the maximum value of current in the coil. Calculate the average power loss due to Joule heating. Where does this power come from?

A uniform magnetic field of 0.3 T is established along the positive Z-direction. A rectangular loop in XY- plane of sides 10 cm and 5 cm carries a current of I = 12A as shown. The torque on the loop is

A square metallic wire loop of side 10 cm and resistance 1Omega is moved with a constant velocity vecv in a uniform magnetic field of induction 2T as shown in figure. The loop is connected to a network of resistances, each of value 3 Omega . The resistance of wires QD and PB are negligible. What should be the speed of the loop to have a steady current of 1 mA in the loop? What is the direction of flow of current?