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CBSE Class 12-science Answered

A circular coil of 200 turns, radius 5 cm carries a current of 2.5 A. It is suspended vertically in a uniform horizontal magnetic field of 0.25 T, with the plane of the coil making an angle of 60o with the field lines. Calculate the magnitude of the torque that must be applied on it to prevent it from turning.
Asked by Topperlearning User | 20 May, 2015, 02:14: PM
answered-by-expert Expert Answer

Answered by | 20 May, 2015, 04:14: PM

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CBSE 12-science - Physics
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CBSE 12-science - Physics
Derive an expression for the torque acting on a loop of N turns, area A, carrying current i, when held in a uniform magnetic field.
Asked by Topperlearning User | 20 May, 2015, 02:11: PM
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CBSE 12-science - Physics
A circular coil of 200 turns, radius 5 cm carries a current of 2.5 A. It is suspended vertically in a uniform horizontal magnetic field of 0.25 T, with the plane of the coil making an angle of 60o with the field lines. Calculate the magnitude of the torque that must be applied on it to prevent it from turning.
Asked by Topperlearning User | 20 May, 2015, 02:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
State the underlying principle of working of a moving coil galvanometer. Write two reasons why a galvanometer cannot be used as such to measure current in a given circuit. Name any two factors on which the current sensitivity of a galvanometer depends.
Asked by Topperlearning User | 20 May, 2015, 02:33: PM
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CBSE 12-science - Physics
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Asked by Topperlearning User | 28 Apr, 2015, 01:54: PM
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CBSE 12-science - Physics
With the help of a neat and labelled diagram, explain the underlying principle and working of a moving coil galvanometer.
Asked by Topperlearning User | 20 May, 2015, 02:36: PM
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CBSE 12-science - Physics
What is meant by current sensitivity of a moving coil galvanometer? On what factors does it depend?In an exercise to increase the current sensitivity of a galvanometer by 25%, its resistance is also increased 1.5 time. How will the voltage sensitivity of the meter be affected?
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CBSE 12-science - Physics
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CBSE 12-science - Physics
A current loop is considered as a magnetic dipole. Explain.
Asked by Topperlearning User | 20 May, 2015, 03:06: PM
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