Electrons Are Circulating in a 0

Electrons are circulating in a 0.58 m diameter cyclotron orbit in a uniform magnetic field of 1.1 T.One can think of these circulating electrons as a circular current loop with the same diameter.The magnetic field is then rapidly increased at a constant rate of 2.5 T/s.What is the magnitude of the induced electric field causing the electrons to increase their speed 25 ms after the magnetic field begins increasing? This is the basis for accelerating electrons in a betatron.

A) 0.018 V/m
B) 0.36 V/m
C) 0.73 V/m
D) 7.0 V/m
E) 14 V/m.

Correct Answer:

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