The magnetic field inside a long solenoid is:
Correct answer: B. Uniform
- A. Varying with radial distance
- B. Uniform
- C. Zero
- D. Not enough Information
Explanation
The magnetic field inside a long straight solenoid-carrying current is the same at all points. It is because the magnetic field in the solenoid is constant because the lines are completely parallel to each other.As shown in figure, the magnetic field lines inside a long solenoid are straight lines, which represents uniform magnetic field.
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About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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