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CBSE - XII Science - Physics - Electromagnetic Induction
What are slip rings ? 1 mark question
Asked by sunitadhingra16
19th February 2020,
12:40 AM
CBSE - XII Science - Physics - Electromagnetic Induction
explain the use of slip rings in ac generator in detail
Asked by modi72879
16th August 2017,
7:41 AM
CBSE - XII Science - Physics - Electromagnetic Induction
Explain with the help of a labelled diagram the underlying principle and working of a step- up transformer.Why cannot such a device be used to step - up d.c voltage? Or Draw a labelled diagram of an a.c generator. Explain briefly its principle and working.
Asked by Topperlearning User
7th July 2015,
2:33 PM
CBSE - XII Science - Physics - Electromagnetic Induction
State the principle of an ac generator. Write an expression for the maximum emf produced in it ?
Asked by Topperlearning User
7th July 2015,
2:19 PM
CBSE - XII Science - Physics - Electromagnetic Induction
In an a.c generator, coil of N turns and area A is rotated at V revolutions per second in a uniform magnetic field B.Write the expression for the emf produced. A 100-turn coil of area 0.1 m2 rotates at half a revolution per second. It is placed in a magnetic field 0.01 T perpendicular to the axis of rotation of the coil. Calculate the maximum voltage generated in the coil.
Asked by Topperlearning User
7th July 2015,
2:05 PM
CBSE - XII Science - Physics - Electromagnetic Induction
Describe briefly, with the help of a labeled diagram, the basic elements of an A.C. generator. State its underlying principle. Show diagrammatically how an alternating emf is generated by a loop of wire rotating in a magnetic field. Write the expression for the instantaneous value of the emf induced in the rotating loop.
Asked by Topperlearning User
7th July 2015,
2:05 PM
CBSE - XII Science - Physics - Electromagnetic Induction
Draw a labeled diagram of an a.c. generator. Explain briefly its principle and working.
Asked by Topperlearning User
7th July 2015,
2:05 PM
CBSE - XII Science - Physics - Electromagnetic Induction
An AC generator consists on a coil of 500 turns of area 100 cm2 each rotating at an angular speed of 75 rpm in a magnetic field of 3 x 10-2 T. Find the peak value of e.m.f induced.
Asked by Topperlearning User
7th July 2015,
2:04 PM
CBSE - XII Science - Physics - Electromagnetic Induction
What are the advantages of three phase a.c.?
Asked by Topperlearning User
7th July 2015,
1:58 PM
CBSE - XII Science - Physics - Electromagnetic Induction
What is a multi phase generator?
Asked by Topperlearning User
7th July 2015,
1:58 PM
CBSE - XII Science - Physics - Electromagnetic Induction
How power is generated in thermal power station?
Asked by Topperlearning User
7th July 2015,
1:53 PM
CBSE - XII Science - Physics - Electromagnetic Induction
Which rule helps in finding the current induced in an AC generator?
Asked by Topperlearning User
7th July 2015,
1:45 PM
CBSE - XII Science - Physics - Electromagnetic Induction
What is an AC Generator? What is its principle?
Asked by Topperlearning User
7th July 2015,
1:43 PM
CBSE - XII Science - Physics - Electromagnetic Induction
On what factor does the frequency of an AC generator depend?
Asked by Topperlearning User
4th June 2014,
1:23 PM
