Questions
Figure shows three regions of magnetic field each of area A, and in each region, magnitude of magnetic field decreases at a constant rate .It is the induced electric field, then the value of the line integral along the given loop is equal to
detailed solution
Correct option is B
As anticlockwise direction is positive, so area vector out wards is positive. So net flux through the given loop isϕ=−BA−BA+BA=−BA∮ E→⋅dr→=−dϕdt=−d(−BA)dt=AdBdt=A(−α)⇒ ∮ E→⋅dr→=−αATalk to our academic expert!
Similar Questions
Shown in the figure is a circular loop of radius r and resistance R. A variable magnetic field of induction is established inside the coil. If the key (K) is closed, the electrical power developed right after closing the switch is equal to
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