a small conducting circular loop is placed inside a long solenoid carrying a current . the plane of the loop contains the axis of solenoid . if the current in the solenoid is varied , the current in the loop is:
clockwise
anticlockwise
zero
clockwise or anti clockwise dependind upon whether resistance is increased or decreased. Explain?
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c) is the correct answer. That's because if u carefully draw the diagram showing field lines of the solenoid, these lines intersect the ring at a right angle to the area vector of the ring.
As flux = B.A
= flux = BA cosT, where T is the angle b/w magnetic field due to the solenoid and the area vector of the ring. Thus T=90 degrees.
as cos90 = 0
therefore flux = 0
As no flux crosses the ring, no emf is induced in the ring, however, may be the varying current.
As flux = B.A
= flux = BA cosT, where T is the angle b/w magnetic field due to the solenoid and the area vector of the ring. Thus T=90 degrees.
as cos90 = 0
therefore flux = 0
As no flux crosses the ring, no emf is induced in the ring, however, may be the varying current.
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