IIT-JEE Exam

A block is moving on an inclined plane making an angle 45° with the horizontal and the coefficient of
friction is m. The force required to just push it up the inclined plane is 3 times the force required to just
prevent it from sliding down. If we define N = 10 m, then N is

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IIT-JEE Other Question

Four solid spheres each of diameter 5 cm and mass 0.5 kg are placed with their centers at the corners of
a square of side 4 cm. The moment of inertia of the system about the diagonal of the square is N ´ 10^-4 kgm2,
then N is long circular tube of length 10 m and radius 0.3 m carries a current I along its
curved surface..A wire-loop of resistance 0.005 ohm and of radius 0.1 m is
placed inside the tube with its axis coinciding with the axis of the tube. The current
varies as I = I0cos(300 t) where I0 is constant. If the magnetic moment of the loop is
Nm0I0sin(300 t), then ‘N’ is