Physics question and answers for September 07, 2024
- Q A person aiming to reach exactly opposite point on the bank of river is swimming at speed of 6 km h at an angle of 150 with the direction of...
- Q 4 A ball of mass m moving with a speed u undergoes a head on elastic collision with a ball of mass nm initially at rest The fraction of the...
- Q A dog of mass m is walking on a pivoted disc of radius R and mass M in a circle of radius R 2 with an angular frequency n the...
- Q 5 If a source of frequency n moving with velocity crosses a stationary observer then the change in the frequency of sound heard by the observer will be velocity of...
- Q One mole of an ideal gas expands from initial state 27 Vo to final state To 2V The process of expansion Work done by the gas TOV 3T is given...
- Q A charge of 10 C flows from point A to B Work done on charge is 8 x 10 3 J What is the potential of point A if potential...
- Q 3 0 3 If and E are current density and electric field respectively inside a current carrying conductor then corred relation is 1 GE 3 j 0 2 jxE 0...
- Q 59 In the first stage of a two stage Carnot engine energy Q is absorbed at temperature T and energy Q is expelled as heat at intermediate temperature T The...
- Q which of the following statement is correct P The addition of pole to an OLTF pulls the root locus to the right Q The addition of pole to an OLTF...
- Q A force F is applied to a dumbbell kept on smooth surface 1 for a time interval t first as in figure i and then as in figure ii The...
- Q Hint P VI 29 Three equal resistors connected in series across a source of EMF together dissipate 10 W of power What would be the power dissipated if the same...
- Q A long solenoid is fabricated by closely winding a wire of thickness 0 5 mm over a cylindrical nonmagnetic frame so that the successive turns nearly touch each other What...
- Q When displacement of a particle executing SHM is one fourth of its amplitude Chen what fraction of total energy is kinetic energy 15 16 0 1
- Q Some of the statements regarding ethanol and ethanoic acid are given below i Ethanoic acid has a pungent smell while ethanol has a pleasant smell ii Ethanoic acid gives litmus...
- Q 133 If the block is pulled by the rope moving wit speed v as shown then the horizontal velocity the block is iw nwoint ai eloinsq Ba 1 V 3...
- Q 7 A particle moving towards east with a velocity of 20 m s In 20 s it changes its velocity to 60 north of east its average acceleration will be...
- Q The time period of a particle in simple harmonic mo ion is equal to the time between consecutive appearance of the particle at a particular point in its motion This...
- Q 5 A tank containing water of mass M is placed on a weighing machine A stone of weight w is hung and lowered in water without touching the sides If...
- Q 91 A projectile is projected from ground with veloci 0 V at an angle 0 with horizontal What is th vertical component of velocity of projectile when vertical displacement is...
- Q 18 A projectile thrown with initial velocity 20 m s at an angle 60 with horizontal then angle of velocity of projectile with horizontal after time 0 732 s is...
- Q A wire 50 cm long and 1 mm2 in cross section carries a current of 4 A when connected to a 2V battery The resistivity of the wire is 1...
- Q 2 The electric resistance of a certain wire of iron is R If its length and radius both are doubled then the resistance 1 Will be doubled and the specific...
- Q A 120V line is protected by a 15A fuse What is the maximum number of 120V 500W light bulbs that can be operated at full brightness from this line A...
- Q An AC generator s coil has 2000 turns and is rotated with angular speed of 500 rad s If the area of the coil is 10 cm and the magnetic...
- Q A bulb and a capacitor are connected in series to a source of alternating current If its frequency is increased while keeping the voltage of the source constant then O...
- Q A pipe 30 cm long is open at both the ends Which harmonic mode of pipe esonates at 1100 Hz source v 330 ms1 sound speed in air O First...
- Q The maximum height attained by a projectile is increased by 10 keeping angle of projection constant What is percentage increase in time of flight 10 5 20 min sec 18
- Q ving 76 Which of the foll 1 Two physical quantities having the same dimension can always be added 2 Precision always leads to accuracy 3 A dimensionally correct equation is...
- Q 119 An ideal diatomic gas is slowly keeping pressure constant The work done by the gas is 1 Q Last 3 3Q 7 w 2 4 Q Q 7
- Q The temperature coefficient of resistivity of a material is 0 0004 C 1 When the temperature of material is increased by 50 C its resistivity increases by 2 x 10...
- Q A small ball of mass 1 kg moves inside a smooth fixed cylinder of radius 1 m in vertical plane Axis of cylinder is horizontal The acceleration of the ball...
- Q In a Wheatstone bridge network the resistances are P 20 Q 20 R 20 and S 302 The resistance in 2 with which S is to be shunted so that...
- Q RMS speed of a monatomic gas is increased to two times of its initial value If the process is done adiabatically then the ratio of final volume to initial volume...
- Q Question 13 and 14 are based on the following physical situation An ideal liquid of density p is filled in a horizontally fixed syringe fitted F with piston There is...
- Q An X ray photon of wavelength and frequency collides with an intially stationary electron but free to move 1 and bounces off If y and are respectively the wavelength and...
- Q Indicate the false statement You can select multiple options Modulation is the process of putting information onto a high frequency carrier The transmitter block in communications system contains the demodulator...
- Q A block of mass 20 g connected to a harmonic motion with frequency of 04 Nm 05 Nm 1 O2 Nm 01 Nm 1 spring of spring constant K executes...
- Q A small mirror used by a dentist gives a magnification of 5 when it is held at a distance of 0 50 cm from a toot The radius of curvature...
- Q Two projectiles of same mass and same initial speed are thrown at 60 and 30 with vertical then which will remain constant Time of flight Horizontal range Maximum height reached...
- Q 2 A wire has resistance of 3 1 2 at 30 C and 4 5 Q at 100 C The temperature coefficient of resistance to the wire is approximately 1...
- Q The piston in a cylinder head of locomotive is having stroke length of 6 cm The piston is executing SHM with an angular frequency of 200 rad min 1 Its...
- Q 32 Which component is related to generation of nerve impulse resulting in sensation of hearing 1 Vibration of ear drum due to sound waves 2 Entry of vibrations in perilymph...
- Q One end of a uniform rod of mass m and length is clamped The rod lies on a smooth horizontal surface and rotates on it about the clamped end at...
- Q A super ball is to bounce elastically back and forth between two rigid walls at a distance d from each other Neglecting gravity and assuming the velocity of super ball...
- Q Two springs of the same material but of length L and 2L are suspended with masses M and 2M attached at their lower ends Their time periods when they are...
- Q Electromagnetic wave consists of periodically oscillating electric and magnetic vectors In mutually perpendicular planes but vibrating with a phase difference of In mutually perpendicular planes but vibrating with a phase...
- Q Two similar circular coaxial loops carry equal currents in the same direction If the loops are brought nearer what will happen Current will increase in each loop Current will decrease...
- Q A bus is running along a highway at a speed of 20 m s A man is at a distance of 100 m from the highway and 400 m from...
- Q The temperature coefficient of resistance for a conductor at 0 C is 0 0125 C If the resistance at 300K is R then temperature at which the resistance becomes doubled...
- Q Binding Energy per nucleon of a fixed nucleus X is 6 MeV It absorbs a neutron moving with KE 2 MeV and converts into Y at ground state emitting a...
- Q Consider the situation shown in the figure The capa A has a charge q on it whereas B is uncharged The charge appearing on the capacitor B a long time...
- Q 2 An ideal gas undergoes a cyclic process as shown in the graph between pressure P and temperature 7 The part of the graph which represents absorbtion of heat from...
- Q Time period of oscillation of rain drop depends on surface tension S density p and radius r Then time period T is Proportional to p Proportional to Proportional to Proportional...
- Q A metal conductor of length 1 m rotates in vertical plane about one of its ends at angular velocity 5 radian per second If the horizontal component of earth s...
- Q The p d across the terminals of the battery is 9V when a current of 3A is in th battery from negative to positive terminal When a current of 2A...
- Q For superposition of two waves in interfe 1 They must have equal frequency and wave length 2 They must have equal frequency but may have unequal wavelengths 3 They must...
- Q lon of radius R in which uniform magnetic field increasing at a constant rate dB dt from the centre is 1 2 3 a The induced electric field at a...
- Q Two isolated charged metallic conductors of capacitance C and C having charges Q and Q respectively are connected to each other After connection there is No change in the energy...
- Q The phase difference between current and voltage in an AC T circuit is radian If the frequency of the AC used is 50 Hz 4 then the phase difference is...
- Q 8 It is a method that is conducted in laboratories wherein the sample or specimen is being evaluated a census b experimentation c interview d observation 3 It refers to...
- Q Two forces in the ratio 1 2 act simultaneously on a particle The resul these forces is three times the first force The angle between two ford 0 60 45...
- Q The condition under which a microwave oven heats up a food item containing water molecules most efficiently is The frequency of the microwaves has no relation with natural frequency of...
- Q The tangential component of acceleration of a particle in circular motion is due CO Speed of particle Change in the direction Change in magnitude of velocity min se Rate of...
- Q 7 A particle moves with a constant velocity parallel to the X axis Its angular momentum with respect to the origin 1 is zero 3 goes on increasing 2 remains...
- Q 12 A particle performing SHM is found at its equilibrium at t 1 sec and it is found to have a speed of 0 25 m s at t 2...
- Q From V IR it can be said that current density is proportional to A conductivity of a metal B electric field D neither A nor B Kirchoff s first law...
- Q 1 A cylinder of length 10 cm made of material of density 0 65 g cm floats half submerged in an ideal liquid kept in closed vessel as shown in...
- Q In the circuit shown in figure when the input voltage of the base resistance is 10 V V is zero and V is ce also zero Value of is RU...
- Q If equation for angular displacement of a particle moving on circular path is given by e 2t 6 where 0 is in radian and t in second then angular velocity...
- Q 68 An ideal gas follows a law according to that its pressure varies with volume as P 1 V B where a and are constants The temperature of the gas...
- Q Which statement is not true 1 Nerve impulse include wave of depolarisation 2 Nerve impulse include wave of repolarisation 3 Synaptic cleft is a gap which is always presen between...
- Q 23 The input signal given to a CE amplifier having a 1 voltage gain of 150 is V 2 cos 15t corresponding output signal will be 1 2 cos 15t...
- Q A particle performs SHM with a period T and ampli tude a The mean velocity of the particle over the time interval during which it travels a distance a 2...
- Q f A and are two vectors given by A 21 31 and B 1 1 then magnitude of A B is C 5 5 5
- Q 4 The displacement produced by a simple harmonic 10 period and maximum velocity of the particle will be wave is y sin 200nt T 17 respectively 1 10 3 second...
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