One end of a conducting bar sits on a circular rail and the other end is fixed to point P such that the bar is able to rotate. A steady and uniform magnetic field B is directed into the page. If the bar is rotated about point P in a clockwise direction, the direction of the induced current though the resistor R is B. X. P X x R a O from a to b. O from b to a. O No current is induced.

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If a wire or coil with an open circuit is moved through a magnetic field . O nothing will happen O a current will be generated through the coil O it depends on the speed O an EMF will be generated in or across the coil

There is 50 mA of current through a coil with 250 turns. The flux is 150 µWb. What is the mmf? What is the reluctance of the circuit?     A. Fm = 1.25 At   -   R=4.3x10-3 At/Wb   B. Fm = 2.25 At   -   R=8.3x10-3 At/Wb   C. Fm = 1.25 At   -   R=8.3x10-3 At/Wb   D. Fm = 1.25 At   -   R=8.3x10-2 At/Wb

What is the induced potential difference at t=2s?

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please explain the steps clearly     Please answer in typing format please ASAP for

In a Curie-type paramagnet, all the ions with magnetic moments contribute to the total susceptibility, but in a metal, only very few of the free electrons contribute to Pauli paramagnetism. Why?

A very long wire generates a magnetic field of 0.0070 x 104 T at a distance of 3.0 mm. What is the magnitude of the current? Select one: O A. 33,000 mA OB. 11 mA O C. 2.3 MA O D. 4700 mA

can you do this question for me?