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Less than f from the mirror
Larger than 2f from the mirror where f is the focal length of the mirror
Equal to f from the mirror
Equal to 2f from the mirror
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 :
A copper disc has a hole. If the disc is heated, the size of the hole
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
A cube of wood supporting a block of mass 200 grains just floats in water. When the block is removed, the cube rises by 2 cm. What is the size of the cube?
A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?
A current carrying conductor is associated with
A current carrying conductor is related with
A cycle tyre bursts suddenly. This represents an
A cyclist moves due east at 8 km/h for half an hour and then turns exactly southwards for another half an hour at 6 km/h. The average velocity of the cyclist for the period is
A decibel is