The optical path of a monochromatic light is same if it goes through 4.0 cm of glass or 4.5 cm of water. If the refractive index of glass is 1.53, the refractive index of the […]
A bullet of mass 0.05 kg moving with a speed of 80 m/s enters a wooden block and is stopped after a distance of 0.40m. The average resistive force exerted by the block on the […]
A light emitting diode(LED) has a voltage drop of 2 volt across it and passes a current of 10 mA when it operates with a 6 volt battery through a limiting resistor R. The value […]
The work done in rotating a magnetic of magnetic moment 2 A-m² in a magnetic field of 5 x 10³ T from the direction along the magnetic field to opposite direction in the magnetic field […]
By sucking through a straw, a student can reduce the pressure of his lungs to 750 nm of Hg (density = 13.6 g/cm³). Using the straw, he can drink water from a glass upto a […]
Two coils of self inductance 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is […]
The refractive index of water, glass and diamond are 1.33, 1.50, 2.40 respectively. The refractive index of diamond relative to water and of glass relative to diamond, respectively are nearly
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(a) 1.80, […]
A block of 2 kg is kept on the floor. The coefficient of static friction is 0.4. If a force F of 2.5 newton is applied on the block, the frictional force between the block […]
A body A experiences perfectly elastic collision with a stationary body B. If after collision the bodies fly apart in the opposite directions with equal velocities, the mass ratio fo A and B is
The time period of a thin bar magnet in Earth’s magnetic field is T. If the magnet is cut into two equal parts perpendicular to its length, the time period of each part in the […]
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