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CBSE Class 12-science Answered

What happens after half rotation of a current carrying coil in a uniform magnetic field?
Asked by Monojit Saha | 30 May, 2013, 09:16: PM
answered-by-expert Expert Answer
Since the magnetic field is uniform, if the direction of rotation is perpendicular to the magnetic field, i.e. if during rotation, the magnetic flux through the coil (area of coil multiplied by magnetic field through it) changes, then an emf is induced which effects the current in the coil.
Answered by | 31 May, 2013, 12:27: AM

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CBSE 12-science - Physics
state biot savart law
Asked by himanshurawat5823 | 08 Mar, 2024, 01:24: PM
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CBSE 12-science - Physics
Answer this:  Assertion (A): When radius of a circular loop carrying a steady current is doubled, its magnetic moment becomes four times.  Reason (R): The magnetic moment of a circular loop carrying a steady current is proportional to the area of the loop.  Select the correct answer from the codes (a), (b), (c) and (d) as given belote.  (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).  (b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).  (c) Assertion (A) is true, but Reason (R) is false.  (d) Assertion (A) is false and Reason (R) is also false.
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CBSE 12-science - Physics
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CBSE 12-science - Physics
How much energy is stored in a 3 cm diameter, 12 cm long solenoid that has 200 turns of wire and carries a current of 0.8A?
Asked by arjunsah797 | 26 Mar, 2022, 09:10: AM
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CBSE 12-science - Physics
Please refer to the uploaded image for the doubt
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Asked by arjunsah797 | 16 Mar, 2022, 02:07: PM
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CBSE 12-science - Physics
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Asked by shantanumail24 | 09 Mar, 2022, 07:04: PM
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CBSE 12-science - Physics
As we know, work done by Magnetic force is always zero in moving a charged particle./So it cannot change speed of charged particle. MY doubt is that, can magnetic force change direction of motion of charged particle?
Asked by yashrajgharte24.12dgatl | 25 Oct, 2021, 06:53: PM
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CBSE 12-science - Physics
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Asked by pushpakumari291279 | 01 Oct, 2021, 11:08: AM
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CBSE 12-science - Physics
Sir , if a magnetic field is increasing in a cylindrical volume at a constant rate. then what will be direction of instantaneous acceleration experienced by an electron placed inside cylinder but not on center?
Asked by yashrajgharte24.12dgatl | 24 Sep, 2021, 04:21: PM
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CBSE 12-science - Physics
why the flux of magnetic field over a closed surface always zero?
Asked by yashrajgharte24.12dgatl | 24 Aug, 2021, 07:23: AM
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