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A car and lorry are both moving with equal kinetic energy. If equal breaking force is applied on both, then before coming to rest the
A car is moving on a road at a uniform speed of 60 km/h. The net resultant force on the car is
A car starts from rest and moves on a straight road with a uniform acceleration of 10 m/s2 for the first 10 s. During the next 10 s, the car moves with the velocity it has attained. What is the total distance covered by the carin 20 s?
A circular loop of wire is rotated at constant angular speed about an axis that makes an angle q with a constant magnetic field as shown in figure. The emf induced in the coil will be zero at all times if
A coating of dust on a computers main circuit boards has this probable consequence
A coil having an inductance of 100 mH is carrying a current of 100 A. If the current is reduced to zero in 0.02 sec, the self induced e.m.f will be
A colour-blind person cannot
A concave lens always forms an image which is
A concave mirror produces a real, inverted image of the same size of the object. Then, the object is at a distance
A convex mirror of focal length f (in air) is immersed in a liquid (u=4/3). The focal length of the mirror in the liquid will be :
