Questions
A planar loop of wire rotates in a uniform magnetic field. Initially, at t=0, the plane of the loop is perpendicular to the magnetic field. If it rotates with a period of 10s about an axis in its plane then the magnitude of induced emf will be maximum and minimum, respectively at:
detailed solution
Correct option is A
∴ω=2πT=π5When ωt=π2 ∵ϕwill have minimum value and e will be maximum ⇒t=π2π5=2.5secWhen ωt=π ∵ϕ will have maximum value and e will be minimum ⇒t=ππ/5=5 secSimilar Questions
A square wire loop, of side a has a long straight wire carrying a constant current i that passes through the centre of the loop and perpendicular to its plane as shown in Fig.
The current induced in the square loop is
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