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Q. A square, single turn coil 0.20m on a side is placed with its plane perpendicular to a constant magnetic field. An emf of 18mV is induced in the coil winding when the area of the coil decreases at the rate of 0.10m2/S. What is the magnitude of the magnetic field?

Q. An m=1 kg tetherball is swinging in a horizontal circle around a pole attached with an l=1.2m long massless rope. It makes an angle of 40 degrees with the pole.

a) find the x and y components of the tension.

b) with what ac velocity is the ball moving?

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Category:- Physics
Reference No.:- M9271063

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