Physics question and answers for August 24, 2024
- Q If 76 eV energy is required to move a proton between two points then the potential difference between them will be 38 V 152 V 76 V
- Q The kinetic energy K of a particle moving in a straight line depends upon the distance s as K as The force acting on the particle is Look 1 2as...
- Q When a man walks on a horizontal surface with constant velocity work done by G 1 friction is zero 2 contact force is non zero 3 gravity is non zero...
- Q P V and P V are initial and final pressures and volumes of a gas in a thermodynamic process respectively If PV constant then the amount of work done is...
- Q If a force F is applied Fv 2 F v 3 F v 4 Fv A train weighing 10 N is running on a level track with uniform speed of...
- Q Two springs of spring constants 1500 N m and 3000 N m respectively are stretched with the same force They will have potential energy in the ratio 1 4 1...
- Q 1 0 5 kw 2 5 kw 3 50 kw A man is riding on a cycle with velocity 7 2 km hr up a hill having a slope 1...
- Q W A bullet of mass 0 04 kg moving with speed of 90 m s enters into heavy wooden block and is stopped after a distance of 60 cm The...
- Q In an isothermal reversible expansion if the volume of 96 gm of oxygen at 27 C is increased from 70 litres to 140 litres then the work done by the...
- Q A water fountain on the ground sprinkles water all around it If the speed of water coming out of the fountain is V the total area around the fountain that...
- Q A non uniform rod of length has linear mass density Aoz where Ao is a positive constant The rod is pivoted at point P and is free to rotate in...
- Q A spherical ball is dropped in a long column of viscous liquid The acceleration of ball as a function of time may be best represented by the graph Question Type...
- Q 1 s 2 s 3 s A force acts on a 3 gm particle in such a way that the position of the particle as a function of time is...
- Q 4 A box of mass 20 kg is connected to mass of 2 kg hanging through a light string and an ideal pulley as shown in figure Coefficient of kinetic...
- Q 4 A particle moving along a straight line has velocity v m s when it covers a distance x along positive x axis The relation between two quantities is y...
- Q 3 A mass of 6 kg is suspended by a rope of length 2 m as shown in figure A force of 80 N is applied at mid point Pas...
- Q The position vector of a particle at any time is given as 7 3ti 212 5k The direction of velocity of particle att 1 sis Making 53 angle with x...
- Q 30 The diagram below shows equipotential lines in a region where there is a uniform electric field A proton is released from rest at the point marked with an O...
- Q The acceleration of a body starting from rest varies with time following the equation a 3t 4 where a is in ms 2 and tin s The velocity of body...
- Q A pendulum bob of mass m carrying a charge is at rest with its string making an angle 8 with the vertical in a uniform horizontal field E The tension...
- Q 1 total energy kinetic energy 3 potential energy A body starts from rest with uniform acceleration and acquires a velocity V in time T The instantaneous kinetic energ of the...
- Q At the room temperature the velocity of sound in 0 gas is V Then in mixture of H and O gas the speed of sound at same temprature BEGIGH 11...
- Q One metallic sphere A is given positive charge whereas another identical metallic sphere B of exactly same mass as of A is given equal amount of negative charge Then Mass...
- Q There is no net transfer of energy by the particles of the medium in Longitudinal wave Transverse wave Progressive wave Stationary wave
- Q An insect crawling up a wall crawls 6 cm up in first second and then slides 4 cm down in next second It again crawls up 6 cm in third...
- Q The parallax of a heavenly body measured from two points diametrically opposite on equator of earth is 2 arc minute If radius of earth is 6400 km the distance of...
- Q Coefficient of performance B of an ideal refrigerator working between temperatures 7 and T T T is B 11 T T T T T T B T T T T...
- Q A mosquito is moving with a velocity 0 5t i 3tj 9k m s and accelerating in uniform conditions What will be the direction of mosquito after 2 s tan...
- Q A uniform electric field is present in X Yplane Due to electrostatic field electric potentials of point A 2 m 2 m B 2 m 2 m and C 2...
- Q A mass of 3 kg rests on horizontal plane The plane is gradually inclined until a an angle of 37 to horizontal the mass just begins to slide down The...
- Q A proton of mass m approaches from very large distance towards a free proton with velocity vo along straight line joining their centres The distance of closest approach of tw...
- Q The number of electrons present in 8 C of charge is 5 0 1018 10 0 1018 5 0 1019 10 0 1019
- Q Ques 4 A pipe 10 cm in diameter contains steam at 100 C It is covered with an insulating material that is 5 cm thick This insulating material has a...
- Q If an object is 8 cm from a lens and produces an image 4 cm from the lens what is the magnification factor M same size of the object triple...
- Q 10FI YA A bar is subjected to axial forces as shown If Y is the modulus of elasticity of the bar and A is its cross section area its elongation...
- Q 4 A long cylindrical vessel is half filled with a liquid When the vessel is rotated about its own vertical axis the liquid rises up near the wall If the...
- Q Identify the correct statement O Kinetic friction depends on area of contact for a given normal contact face O Coefficient of kinetic friction is generally less than coefficient of static...
- Q Shown in the figure is a shell made of a conductor It has inner radius a and outer radius b and carries charge Q At its centre is a dipole...
- Q he acceleration of a body starting from rest varies with time following the quation a 3t 4 where a is in m s2 and t in s The velocity of...
- Q An AC circuit consists of a 2200 resistance and a 0 7 14 choke Find the impedance of the coat when the resistance and the choice are in series and...
- Q A tube of length 3 m is filled completely with an incompressible liquid of mas kg and closed at both ends The tube is rotated in horizontal plane about one...
- Q soap bubble is charged to a potential of 16 V its radius is then doubred The potential of the bubble now will be Click here to view this option Ref...
- Q The radii of circular paths of two particles of same mass are in ratio 3 4 ther what will be ratio of speed if they have some magnitude of centripetal...
- Q A wheel of per meter 220 cm rolls on a level road at a speed of 9 km h How many evolutions does the wheel make per second 5 Click...
- Q Ques 3 A circuit consists of a resistance R ohm s and a condenser of C farads connected to a constant e m f If is the voltage of the...
- Q A truck starts from rest and has acceleration of 4 ms 2 A box is inside truc which is at 6 m from open end of truck The coefficient of...
- Q By how much should the temperature of a brass rod be increased so as to increase its length by 1 Given for brass is 0 00002 O Cick here to...
- Q vectors each of a magnitude V make an angle of 60 with each other The magnitude of the sessitant vector a Click here to view this option et N 241401...
- Q Ques 5 A constant electromotive force E volts is applied to a circuit containing a constant resistance R ohms in series and a constant inductance L henries If the initial...
- Q A body executing uniform circular motion has position vector and accelera vector Are perpendicular to each other Are along same direction Are in opposite direction May be inclined at any...
- Q n accordance with Kirchhoff s law for a black body radiation which one is wrong Bad absorber is a bad emitter Bad reflector is a good emitter Bad emitter is...
- Q Two point charges 4Q and Q are placed on X axis as shown in the figure Distance between two charges is 4 m Electrostatic potential is zero on the X...
- Q A man of mass 60 kg stands on weighing machine in a lift which is moving down and speeding up with an acceleration of 2 3 m s What will...
- Q A freely running motor rests on a thick rubber pad to reduce vibration Fig 1 53 The motor sinks 10 cm into the pad Estimate the rotational speed revolutions per...
- Q An object is dropped from the top of a tower It travels a distance 5 m in the fir second and 25 m in the last second The speed with...
- Q um logic gate we switch cloxo I uhim ourdon t wined Path 6V 221 1 bez it will offer existence m 14 The circuit 1 NOR 3 OR A 0...
- Q 7 893 gram of a substance occupies a volume of 1 1 cm The density c substance with appropriate significant figures is 07 18 g cm 3 O 7 20...
- Q The lengths of two cylindrical rods are measured as I 5 62 0 4 34 0 02 cm What is maximum percentage error in measur difference of lengths of two...
- Q For the velocity v time t graph shown below what is the average velocit object during first 7 seconds 10 m s 013 O 4 2 m s 6 5...
- Q 11 From a place on the ground that is 20 m away from a wall a bullet is fired aiming at a 50 m high mark on the wall The...
- Q TO 180 2 An electric dipole is situated in electric field of uniform intensity Ewhose dipole moment is P and moment of inertia If the dipole is slightly disturbed from...
- Q Two concentric spheres of radii 1 m and 2 m have similar charges with equal surface densities o The electric potential at the common center is 30 blow 20 ola
- Q q Three charges each of magnitude q are placed at the corner of an equilateral triangle of side a the electrostatic force on each charge will be 9 q 4...
- Q When separation between the charges is increased the electric potential energy of the system of charge Increases Decreases Remains same May increase or decrease
- Q Electric Potential at the Edge of a Disc Calculate the electric potential due to a uniformly charged conducting circular disc at a point lying at the edge of disc Surface...
- Q When a car passes mark A driver applies brakes Thereafter reducing where in the Road speed uniformly from 160 km h at A the car passes mark with a speed...
- Q Two identical conductors of copper and aluminium are placed in an identical electric field The magnitude of induced charge in the aluminium will be O Zero Greater than in copper...
- Q surface in terms of interfacial tensions OR Account for the angle of contact in terms of interfacial tensions OR Draw diagram showing force due to surface ten sion at the...
- Q The purpose of glass cover on top of a box type solar cooker is to A Allow one to see the food being cooked 3 Allow more sunlight into box...
- Q For a dipole having magnitude of charge q 4 10 6 C and distance between the charges d 0 02 m If this dipole is placed in a electric field...
- Q 57 The shape of impure water meniscus is concave whereas that of mercury meniscus is convex Explain why OR Explain why the angle of contact of mercury with glass is...
- Q wo very small spheres having charge Q and Q face each other at a certain distance between them If a dielectric having dielectric constant Kinserted between them then electrostatic force...
- Q The ratio of electric potential due to a short electric dipole at point A whose position vector w r t centre of dipole makes 60 angle with direction of dipole...
- Q 55 Explain why the free surface of some liquids in contact with a solid is not horizontal OR Explain the formation of concave and covex sur face of a liquid...
- Q 35 180 Mark for Review The displacement of charge 2 C in the electric field E 21 3 k N C is r 2k m The work done is 2...
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