Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
A uniform cylindrical wire is subjected to a longitudinal tensile stress of 5 × 10 ^ 7 N/m 2 . Young’s modulus of the material of the wire is 2 × 10 ^ 11 N/m 2 . The volume change in the wire is 0.02 %. The fractional change in the radius is
10
Oct
A uniform cylindrical wire is subjected to a longitudinal tensile stress of 5 × 10 ^ 7 N/m 2 . Young’s modulus of the material of the wire is 2 × 10 ^ 11 N/m 2 . The volume change in the wire is 0.02 %. The fractional change in the radius is A steel [...]
A steel wire is suspended vertically from a rigid support. When loaded with a weight in air, it expands by and when the weight is immersed completely in water, the extension is reduced to 14 cm . Then relative done of the material of weight is
10
Oct
A steel wire is suspended vertically from a rigid support. When loaded with a weight in air, it expands by and when the weight is immersed completely in water, the extension is reduced to 14 cm . Then relative done of the material of weight is A steel wire is suspended vertically from a rigid [...]
Two wires of the same material and same mass are stretched by the same force. Their length are in the ratio 2:3. Their elongations are in the ratio
10
Oct
Two wires of the same material and same mass are stretched by the same force. Their length are in the ratio 2:3. Their elongations are in the ratio Two wires of the same material and same mass are stretched by the same force. Their length are in the ratio 2:3. Their elongations are in the [...]
If the work done in stretching a wire by 1 mm is 2 J, then work necessary for stretching another wire of same material but with double radius of cross -section and half of the length by 1 mm is
10
Oct
If the work done in stretching a wire by 1 mm is 2 J, then work necessary for stretching another wire of same material but with double radius of cross -section and half of the length by 1 mm is If the work done in stretching a wire by 1 mm is 2 J then [...]
A massive stone pillar 20 m high and of uniform cross section rests on a rigid base and supports a vertical load of 5.0×10 ^ 5 N at its upper end. If the compressive stress in the pillar is not exceed 16 × 10 ^ 6 N/m, what is the minimum cross-sectional area of the pillar? ( Density of the stone= 2.5 × 10^3 kg/m^3 take g = 10 N/kg
10
Oct
A massive stone pillar 20 m high and of uniform cross section rests on a rigid base and supports a vertical load of 5.0×10 ^ 5 N at its upper end. If the compressive stress in the pillar is not exceed 16 × 10 ^ 6 N/m, what is the minimum cross-sectional area of the [...]
A ball falling in a lake of depth 200 m shows a decrease of 0.1% in its volume at the bottom. The bulk modulus of the elasticity of the material of the ball is (take g = 10 m/s^2)
10
Oct
A ball falling in a lake of depth 200 m shows a decrease of 0.1% in its volume at the bottom. The bulk modulus of the elasticity of the material of the ball is (take g = 10 m/s^2) A ball falling in a lake of depth 200 m shows a decrease of 0.1% in [...]
A small but heavy block of mass 10 kg is attached to a wire 0. 3 m long. Its breaking stress is 4.8 × 10^7 N/m^2. The area of the cross section of the wire is 10^−6 m^2. The maximum angular velocity with which the block can be rotated in the horizontal circle is
10
Oct
A small but heavy block of mass 10 kg is attached to a wire 0. 3 m long. Its breaking stress is 4.8 × 10^7 N/m^2. The area of the cross section of the wire is 10^−6 m^2. The maximum angular velocity with which the block can be rotated in the horizontal circle is A [...]
A copper bar of length L and area of cross section A is placed in a chamber at atmospheric pressure. If the chamber is evacuated, the percentage change in its volume will be ( compressibility of copper is 8 × 10^−12 m^2/N and 1 atm = 10^5 N/m)
10
Oct
A copper bar of length L and area of cross section A is placed in a chamber at atmospheric pressure. If the chamber is evacuated, the percentage change in its volume will be ( compressibility of copper is 8 × 10^−12 m^2/N and 1 atm = 10^5 N/m) A copper bar of length L and [...]
Two blocks of masses 1 kg and 2 kg are connect by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is ( 40 / 3 pie ) x 10^6 N/mm^2 . What should be the minmum radius of the wire used if it is not to break? Take g = 10 m/s^2
10
Oct
Two blocks of masses 1 kg and 2 kg are connect by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is ( 40 / 3 pie ) x 10^6 N/mm^2 . What should be the minmum radius of the wire used if it is not [...]
A long elastic spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm, the PE will be
10
Oct
A long elastic spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm, the PE will be A long elastic spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm the PE will be October [...]