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Magnetism and Electromagnetism

Q1: The Hall effect

A is a phenomenon with no practical applications

B is used in various sensor applications

C can develop potentials of thousands of volts

D is the basis for solar cell operation

ANS:B - is used in various sensor applications

The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879.



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