Physics question and answers for April 07, 2024
- Q 5 A boy s catapult is made of rubber cord which is 42 cm long with 6 mm diameter of cross section and of negligible mass The boy keeps a...
- Q Thickness of quartz is changed from 2mm to 2 8 mm then ratio of new to old frequency 10 O 0 20 05 O 0 71 The electrical conductivity of...
- Q The breaking stress of a material is 10 pascal If the density of material is 3 10 kg m The maximum length of the wire for which it does not...
- Q 93 C and Si both have same lattice structure having 4 bonding electrons in each However C is insulator whereas Si is intrinsic semiconductor This is because 2012 a In...
- Q A gas undergoes a process where pressure P 3V4 at every instant here V is the volume Find an expression for the bulk modulus B in terms of volume if...
- Q Consider the situation shown in figure The force F is equal to the m g 2 If the area of cross section of the string connecting both block is A...
- Q The temperature coefficient of resistance of a conductor is 0 0025 C At 200 K its resistance is 2 The resistance of the conductor will be 8 Q at temperature...
- Q 9 Water flows steadily through a horizontal pipe of variable cross section If the pressure of water is p at a point where flow speed is v the pressure at...
- Q A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied which stretches their combined length by 1...
- Q at e f of A cubical block of wood of edge 3 cm floats in water The lower surface of the cube just touches the free end of a vertical...
- Q The freezing point of pure benzene is 5 40 C and that of solution containing 2 0 gm of solute per 100 gm of benzene is 4 40 C Calculate...
- Q vertical wires 1 2 ane 3 are a rod of mass Min as the figure The wires are of equal length and equal cross sectional area It is given that...
- Q Three identical balls of rubber aluminum and steel are dropped from the same height on a horizontal rigid surface If Vrubber VA1 and V steel are their speeds just after...
- Q A crystal has a coefficient of expansion 13 10 7 in one direction and 231 x 10 7 in every direction at right angles to it Then the cubical coefficient...
- Q A perfect reversed heat engine is used for making ice at 5 C from water available at 25 C The temperature of freezing mixture is 10 C Calculate quantity of...
- Q A soap film is formed on a vertical equilateral triangular frame ABC Side BC can move vertically always remaining horizontal If m is the mass of rod BC and T...
- Q 26 If p is the density of the material of a wire and othe breaking stress The greatest length of the wire that can hang freely without breaking is 20...
- Q 2 Draw a complete shearing force and a bending moment diagram for the for the beam shown in the figure Show detailed calculations Use the last two digits of your...
- Q A 0 70 kg metal dish contains 1 kg of water at 20 C A 0 5 kg iron bar at 120 C is dropped into the water and the...
- Q A brass wire of length 4 5m with cross section area of 3x105 m and a copper wire of length 5 0m with corss section area 4x105 m are stretched...
- Q 44 A glass capillary of length 1 and inside radius r r l is submerged vertically into water The upper end of the capillary is sealed The atmospheric pressure is...
- Q 24 X 10 EX max 2 The work function of caesium metal is 2 14 eV When light of frequency 6 x 10 4 Hz is incide on the metal...
- Q Q 16 The axial load of 56 kN is applied to a bar of 36 mm diameter and 1 m length The extension of the bar is measured to be...
- Q A copper wire of cross section A is under a tension T It Young s modulus is Yand Poisson s ratio o The decrease in cross section of wire will...
- Q Assuming Newton s law of cooling to be valid The temperature of body changes from 60 C to 40 C in 7 minutes Temperature of surroundings being 10 C its...
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