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CBSE - XII Science - Physics - Electromagnetic Induction

 a square loop initially kept away from the region of magnetic field .then it is moved towards the right with a constant velocity and goes out of the field.plot the graph showing the variation of
1)magnetic flux through the loop with time
2)induced emf in the loop with time
 

Asked by modi72879 21st November 2017, 4:51 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

I am trying but.. I am stuck.. please help..
 
Asked by nitishkrnehu09 18th November 2017, 10:45 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

A transformer of eficiency 90% has turns ratio 1:10 . If the voltage across the primary is 220V and current in the primary is 0.5A, calculate the voltage across the secondary and the current in the secondary.

Asked by rutujasarangmehta 15th March 2016, 9:33 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A circuit contains a 50 ohms resistor, 0.3 H inductor of resistance of 2 ohms and a capacitor of 40 micro farad , all connected in series with a 200V, 50Hz AC supply. Calculate (a) inductive reactance (b) capacitive reactance (c) impedance and (d) the current and (e) the power factor.

Asked by rutujasarangmehta 15th March 2016, 9:29 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A series LCR circuit contains a coil of inductance 1H, a resistance of 1000 ohms and a capacitance of 0.1 micro farad being connected in series to a 1V , 50Hz AC supply. find the impedence , current and the resonance frequency of the circuit.

Asked by rutujasarangmehta 15th March 2016, 9:14 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A coil consists of 200 turns and of radius 0.2m is placed perpendicular to a uniform magnetic field of flux density 0.25T. find the emf induced in the coil in 0.25s (a) the field is reduced to zero (b) the field is reversed in direction and (c) the coil is rotated through 90 deg.

Asked by rutujasarangmehta 15th March 2016, 8:38 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A copper rod of length 0.8 m rotates about one of its ends in a magnetic field of induction 0.6 Wb/m², the plane of the rotation being at right angle to the field. Find the change in the magnetic flux in a rod?

Asked by Topperlearning User 7th July 2015, 9:47 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Find the change in magnetic flux in a coil of 200 turns and cross-sectional area 0.4 m², when a magnetic field perpendicular to the plane of the coil changes from 0.1 Wb/m² to 0.6 Wb/m².

Asked by Topperlearning User 7th July 2015, 9:43 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A square coil of side 4 cm consists of 100 turns. The coil is initially in vertical plane such that the plane of the coil is normal to the magnetic field of induction 0.8 Wb/m². The coil is then turned through 180° about horizontal axis. Find the net change in the magnetic flux.

Asked by Topperlearning User 7th July 2015, 9:31 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Calculate the rate at which the flux linked with the generated area changes with time t, when a copper rod of length l is translated in a uniform magnetic field B.

Asked by Topperlearning User 7th July 2015, 9:15 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Why a small resistor is usually put in parallel to the current carrying coil of an electromagnet?

Asked by Topperlearning User 7th July 2015, 9:08 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Describe a simple experiment to show that currents induce currents.

Asked by Topperlearning User 7th July 2015, 9:03 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

What are the observations made by Faraday in his experiment given below?

Asked by Topperlearning User 7th July 2015, 8:51 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

What is magnetic induction? What are its units?

Asked by Topperlearning User 7th July 2015, 8:49 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

When is the magnetic flux linked with the circuit (a) maximum and (b) minimum?

Asked by Topperlearning User 7th July 2015, 8:48 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Enlist the factor on which the magnetic flux linked with the circuit depends.

Asked by Topperlearning User 7th July 2015, 8:45 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A circular coil and a bar magnet placed nearby are made to move in the same direction. If the coil covers a distance of 2 m in 1 sec and the magnet a distance of 4 m in 2 sec. calculate the induced emf produced in the coil.

Asked by Topperlearning User 7th July 2015, 8:43 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A coil of area 0.5 m² is situated in a uniform field B = 2 Wb/m² and the normal to the plane of the coil makes an angle of 60° with respect to the magnetic field. Find the magnetic flux through the area A.

Asked by Topperlearning User 7th July 2015, 8:38 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

What is the units of magnetic flux? How are they related? Is magnetic flux a scalar or vector quantity?

Asked by Topperlearning User 7th July 2015, 8:35 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Write an expression for the magnetic flux linked with the surface?

Asked by Topperlearning User 6th July 2015, 4:51 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

What is magnetic flux?

Asked by Topperlearning User 6th July 2015, 4:49 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

Give physical interpretation of the Lenz's law.

Asked by Aditya Great 7th December 2014, 1:11 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

name the physical quantity whose si unit is Wb/m2,whether it is scalar or vector

Asked by Ashok Rana 17th August 2014, 2:14 PM
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