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Magnetism and Electromagnetism

Q1: A Hall effect sensor

A exists only in theory

B is a noncontacting magnetic sensor

C can operate only a few times before failure

D produces very large voltages

ANS:B - is a noncontacting magnetic sensor

Hall effect is a sensor which is use to sense the magnetic field with out any physical connection to the magnetic field generating object. It operate in such a way that when a current carrying conductor is placed in a magnetic field it it induce a voltage in a conductor which will be perpendicular to the magnetic field and current.



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