Strength of an electromagnet can be increased by

A. increasing the cross-sectional area

B. increasing the number of turns

C. increasing current supply

D. all above methods

Answer: Option D

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Related Questions on Magnetism and Electromagnetism

Main causes of noisy solenoid are

A. strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force

B. uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts

C. both of above

D. none of the above