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If an electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum, then its final velocity will be
A dust particle of mass 10−3 gm is stationary between the plates of a horizontal parallel plate capacitor of 0 · 016m separation which is connected to a voltage of 100V. How many fundamental charges e = 1 • 6 * 10−19 C the dust particle carries
A uniform chain of length L changes partly from a table which is kept in equilibrium by friction. The maximum length that can Withstand without slipping is l, then coefficient of friction between the table and the chain is
A body is projected up with a velocity equal to 3/4 th of the escape velocity from the surface of the earth. The height it reaches is ( Radius of eatth = R)
Two cylinders of equal size are filled with equal amount of ideal diatomic gas at room temperature. Both the cylinders are fitted with pistons. In cylinder A the piston is free to move, while in cylinder B the piston is fixed. When same amount of heat is supplied to both the cylinders, the temperature of the gas in cylinder A raises by 20oK. What will be the rise in temperature of the gas in cylinder B?
The magnitude moment of a magnetic wire of length L is M. What will be its magnetic moment, when it is bent in the form of a semicircle?
24 cm3 of water flows per second through a capillary tube of radius r cm and length l cm, when connected to a pressure head h cm of water. If a tube of the length l/2 cm and radius r/2 cm is connected to the same pressure head, then volume of water flowing per second through the tube is
The angularspeed of seconds needle in a mechanical watch is
Which of the following function represents a simple harmonic motion?
A body of mass MKg is on the top point of a smooth hemisphere of radius 5m. It is released to slide down the surface of the hemisphere. It leaves the surface when its velocity is 5ms-1. At this instant the angle made by the radius vector of the body with the vertical is (g=10ms-2)