A bullet of mass 10 g moving horizontally with a velocity of ( 400 \mathrm{~m} \mathrm{~s}^{-1} ) strikes a wooden block of mass 2 kg which is suspended by a light inextensible string of length 5 m . As a result, the centre of gravity of the block is found to rise a vertical distance of 10 cm . The speed of the bullet after it emerges out horizontally from the block will be

Photons with energy 5 eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectr…

The interference pattern is obtained with two coherent light sources of intensity ratio \( n \). In the interference pa…

A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The en…

A parallel- plate capacitor of area \( A \), plate separation \( d \) and capacitance \( C \) is filled with four diele…

An electric dipole is placed at an angle of \( 30 ^ { \circ } \) with an electric field intensity \( 2 \times 10 ^ { 5…

The temperature inside a refrigerator is \( t { 2 } { } ^ { \circ } \mathrm { C } \) and the room temperature is \( \ma…

Two rotating bodies \( A \) and \( B \) of masses \( m \) and \( 2 m \) with moments of inertia \( I { A } \) and \( I…

The highest DDT concentration in aquatic food chain shall occur in

A lake which is rich in organic waste may result in

Match Column-I with Column-II and select the correct option using the codes given below: \begin{tabular} { | l | l | }…