Electrical Machines and Laws Quiz

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Questions and Answers

According to Faraday's law of electromagnetic induction, which of the following is true?

The induced electromotive force in a circuit is inversely proportional to the magnetic field strength

The induced electromotive force in a circuit is directly proportional to the rate of change of magnetic field strength (correct)

The induced electromotive force in a circuit is directly proportional to the magnetic field strength

The induced electromotive force in a circuit is inversely proportional to the rate of change of magnetic field strength

According to Lenz's law, which of the following is true?

The direction of the induced current in a circuit is determined by the resistance of the circuit

The direction of the induced current in a circuit is random

The direction of the induced current in a circuit is the same as the change in magnetic field that caused it

The direction of the induced current in a circuit opposes the change in magnetic field that caused it (correct)

According to Maxwell's right hand grip rule, which of the following is true?

The thumb represents the direction of the magnetic field, and the curled fingers represent the direction of the force experienced by a current-carrying conductor in that field

The thumb represents the direction of the magnetic field around a straight current-carrying conductor, and the curled fingers represent the direction of the current in the conductor

The thumb represents the direction of the force experienced by a current-carrying conductor in a magnetic field, and the curled fingers represent the direction of the magnetic field

The thumb represents the direction of the current in a straight current-carrying conductor, and the curled fingers represent the direction of the magnetic field around the conductor (correct)