Electro Magnetic Induction And Alternating Currents Question 461
Question: A flexible wire loop in the shape of a circle has radius that grown linearly with time. There is a magnetic field perpendicular to the plane of the loop that has a magnitude inversely proportional to the distance from the center of the loop,
Options:
A)
B)
C)
D) E is constant
Show Answer
Answer:
Correct Answer: D
Solution:
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Let radius of the loop is r at any time t and in further time dt, radius increases by dr.
The change in flux:
The change in flux:
