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A 100 watt bulb is kept switched ON for four hours. The units of electrical energy consumed
A 3 phase semiconverter when supplying a certain load has a rectification efficiency of 0.6 and transformer utilisation factor of 0.35
A ball is moving with a speed v towards north, collides with an identical ball, moving with the same speed towards east. After the collision, the two balls stick together and move towards north-east. The speed of the combination is
A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of
A ball is thrown vertically upwards. Assuming the air resistance to be constant and cosiderable
A ball moving with uniform velocity comes to rest in a distance of 72 m in 6 s. Its initial velocity and retardation are
A ball rolling along the ground gradually slows down and finally comes to rest is due to _
A balloon filled with hydrogen will
A beam of light travelling at a velocity of V m/s is incident at an angle 45° on a glass. Slab of refractive index 1.5. What is the velocity of the beam of light inside the slab?
A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will
