Physics question and answers for August 16, 2024
- Q 19 Two particles executing SHM of same frequency meet at x A 2 while moving in opposite directions Phase difference between the particles is It 1 3 51 2 4...
- Q In a refrigerator the system extracts heat of 600 J from a cold reservoir and released 900 J of heat to hot reservoir The coefficient of performance of a refrigerator...
- Q When a magnet is being moved towards a coil the induced emf does not depend upon 1 the number of turns of the coil 2 the motion of the magnet...
- Q The absolute temperature of air in a region linearly increases from T and T in a spac of width d Find the time taken by sound wave to goes through...
- Q The circuit below represents a non inverting integrator For high frequencies o the input impedance is a 0 b R For low frequencies o the input impedance is c R...
- Q A car s displacement from home is measured in miles by the the function d t t 2 t 12 where t is measured in minutes Which option represents all...
- Q A block of mass 1 kg is placed on a fixed wedge at a height of 2 m as shown in figure Find maximum compression in the spring of spring...
- Q 27 3 2n s 4 3 s A particle of mass 10 g is undergoing SHM of amplitude 10 cm and period 0 1 s The maximum value of force...
- Q a A 15 kg brick is moves along an x axis Its acceleration as a function of its position is shown in figure The scale of the figure s vertical...
- Q A chain is held on a frictionless table wi th 1 5th of its lengt h hanging over the edge If the chain h as a length L and m...
- Q When a battery is connected across a series combination of inductance L and resistance R the variation in current with time tis best represented by Only one correct answer B...
- Q 30 The zeroth law of thermodynamics for three systems J K CET 2013 A B and C in contact demands that a A and B are in thermal equilibrium b...
- Q Velocity v versus time t graph of a particle moving in tan o tan then average speed of the particle till the time its velocity becomes zero is v m...
- Q A car 1000 kg is going 20 m s on a level road and slams on the brakes The skid marks are 25m long a What is the change in...
- Q solid sphere placed on rough horizontal surface is given velocity vo as shown at t 0 If coefficient of riction is then time to at which it rolls without slipping...
- Q 23 For a particle executing simple harmonic motion the amplitude is A and time period is T The maximum speed will be 1 4AT 24 3 2 A 2A 2...
- Q ball falls from height h After 1 second another ball falls freely from a point 20 m below the point from where the first ball falls Both of them reach...
- Q A transport plane travelling at a steady speed of 64 ms and an altitude of 68 m releases a parcel when it is directly above a point Q on level...
- Q Innumerable physical phenomena happening around us can be understood A only with the help of a large number of complex physical laws B only by building mathematical models C using...
- Q 4 The maximum possible efficiency of a hea engine is 1 100 T 2 2 1 T 4 Dependent upon the temperature of source 7 and sink T and is...
- Q A ring composed of three sections The cross sectional area is 0 001 m for each section The mean arc length are Ia 0 3m Ib 0 2m Ic 0...
- Q In an experiment an object is heated The data from the experiment is shown The energy transferred to the object is 3 0 kJ The mass of the object is...
- Q b A sample of Ge is doped to the extent of 10 4 donor atoms cm and 7x10 3 acceptor atoms cm At temperature of the sample the resistivity of...
- Q Question 23 X In the circuit shown in figure Xc R 2 9 i the value of x M M 4 00 through source is R wwwwww C HH ooooo...
- Q amped Harmonic Motion 29 The quality factor of a sonometer wire is 4 000 The wire vibrates at a frequency of 300 Hz Find the time in which the amplitude...
- Q the capacitors in Fig 4 72 are initially uncharged and are connected as in the diagram with switch S open The applied potential difference is Vah 360 V ab 3...
- Q 16 A transverse wave is represented by equation y yo sin 32 74 ut k For what value of 2 is the particle veloc equal to two times the wave...
- Q A body of mass 30 kg stands on a weighing machine lying on the floor of a lift What will be the weight of the body when i lift moves...
- Q Q8 A particle starts from rest at t 0 and starts moving on a circular path of radius m with 4 TC tangential acceleration 6 m s2 where t is...
- Q ST 3 4 12 12 21 A particle is executing S H M between x A The time taken to go from 0 to is T and to go from...
- Q The value of the Plank constant we measure here h 6 4 0 2 x 10 34 J sec is in agreement with the standard measured value 6 62607004 10...
- Q Define losses of transformer The efficiency of 400KVA singe phase transformer is 98 77 when delivering full load at 0 8 pf lagging and 99 13 at half full load...
- Q A positive point charge qo is placed t a point C inside the cavity in spherical conductor as shown in figure Find the electric potential at point P Given K...
- Q Question 35 A Activity of a radioactive nuclei 100x sample is 6 023 1012 dps then mass of radioactive nucleii sample will be given 2 of X is 10 min...
- Q Tom Screen pus It implies that the field at every point on a circle of radius r with the wire along the axis is same in magnitude In other words...
- Q A particle is moving with speed v b x along positive x axis Calculate the speed of the particle at time t V T assume that the particle is at...
- Q Three particles of masses 1 kg 2 kg and 3 kg are placed at three corners of a right angled triangle of sides 3 cm 4 cm and 5 cm...
- Q Question 18 M M 4 00 Three alternating voltage sources V 3 sin oot V 5sin ot volt and connected Q 3 volt N M 1 00 V 5sin ot...
- Q Waves from two different sources overlap near a particular point The amplitude and the frequency of the two waves are same the ratio of the intensity when the two waves...
- Q An ideal heat engine working between temperature T and T has efficiency n If both the temperature are raised by 50 K each then the new efficiency of heat engine...
- Q Q7 The velocity of a particle varies with time as v 31 4 5t 3 m s Find the average velocity of the particle for a time interval between t...
- Q 7 Two identical springs have the same force constant 73 5 Nm The elongation produced in each spring in three cases shown in Figure 1 Figure 2 and Figure 3...
- Q A non conducting ring of radius R and mass m having uniform charge distribution having a small cut of length b b R is released from rest with its plane...
- Q Question 20 A A damped oscillator has a frequency that is 0 8 times its undamped frequency By what factor is the amplitude of the oscillator decreased during each oscillation...
- Q An oil drop carries six electronic charge has mass of 1 6 x 10 12 g and falls with terminal velocity in air What magnitude of vertical electric field is...
- Q Energy band gap of silicon is 1 14 eV 19 f Maximum wavelength at which silicon will start showing conductivity is 1 10888 nm 3 108 88 nm Mo 2...
- Q agnetic field If shape of the coil is varied witho ut chang ing its perimeter and current through it torque act ing on it will be 1 same for any...
- Q 01 A marble is bouncing down a stairs in a regular manner hitting each step at identical points and then rising the same height H above each step Height and...
- Q carpet is laid on the floor having mass per unit length A External force required to move one end of the carpet with uniform velocity Vo as shown in figure...
- Q 3 CW In horizontal plane A current is flowing in electricity line towards north the direction of magnetic field at a point which is just 4 CW In vertical plane...
- Q Five capacitors are connected as show n in the figure Initially all capacitors ar e uncharged and S is open When S is c losed then the potential difference bet...
- Q 15 In the adjacent figure if the incline plane is smooth and the springs are identical then the period of oscilla of this body is 1 2n 3 2 M...
- Q on both P and Q 20 A body Q is placed on a frictionless surface On the upper surface of Q which is rough another body P is placed and...
- Q A small orifice of area a is at the bottom of a tube of cross sectional area 3a Water filled up to height H in it and orifice is opened...
- Q In the circuit shown X is joined to Y for a long time and then x is joined to Z The total heat produced in R is XH 1 2...
- Q Q No 85 to 86 A crystal belongs to a face centered cubic lattice with four atoms in the unit cell The size of the crysta is 1 cm and...
- Q A lift is going up The variation in the speed of the lift is as given in the graph What is the height to which the lift takes the Velocity...
- Q A particle travels in circle of radius 20 cm at a speed that uniformly increases It speed changes from 5 m s to 6 m s in 2 s The...
- Q Q5 In the arrangement shown mass of pulley P is m and pulley Q is massless Both the pulleys are frictionless There is friction between m and ground whereas surface...
- Q a Obtain the equivalent circuit of a 200 400 V 50 Hz single phase transformer from the following test data O C test 200V 0 7A 70 W on L...
- Q Teacher please explain isn t 1kohm our output resistance And if we find Vc across 1kohm then will it not be the ans wer Why we minus 18 Vc Please...
- Q The block A in figure weighs 100 N The coefficient of static friction between the block and the table is 0 25 The weight of the block B is maximum...
- Q A particle starts with an initial velocity of 2 5 m s along positive x axis How much distance will it cover in reaching velocity of 7 5 m s...
- Q 5 An L C circuit contains a 20 mH inductor and a 50 F capacitor with an initial charge of 10 mC The resistance of the circuit is negligible Let...
- Q 34 A sphere centered at the origin has radius 0 200 m A 500 C point charge is on the x ax x 0 300 m The net flux through...
- Q Calculate the hinge force when the rod of mass M becomes vertical Initial situation is shown in figure and string is then cut hinge is frictionless wym O Fx 0...
- Q 3 times 12 mes 14 Imagine a narrow tunnel between the two diametrically opposite points of the earth A particle of mass released in this tunnel The time period of...
- Q Find the force on the charge q in the Figure shown below The zy plane is a grounded conductor Xx 3d q de 2q y V 0
- Q Question 19 M M 4 00 N M 1 00 At a point P on the screen at distance D from the slits in standard YDSE experiment 3rdmaxima is observed...
- Q 1 A box with a mass of 4 00 kg sits on top of a box with a mass of 6 00 kg The coefficient of kinetic friction between the...
- Q The plane x 0 is uniformly charged with the surface density o 0 and the plane y 0 with the surface density o Find the strength of the electric field...
- Q A sphere of radius 0 5 m rolls on the plank without slipping If velocity of sphere and plank is 10 m s and 5 m s respectively as shown...
- Q Mark the correct statement about longitudinal pressure wave A The density variation and the longitudinal velocity of the particles have their maxima and minima at the position of equilibrium of...
- Q Q12 Light is incident on a right angle prism as shown in figure On the hypotenuse of prism a drop of liquid is placed The refractive index of prism is...
- Q At the instant shown in the figure the block A is moving downwards at speed u If the string is tight and the block B moves horizontally the speed of...
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