Physics question and answers for September 05, 2024
- Q A parallel plate capacitor with circular plates of radius R is being charged with a current as shown in the figure At R and R is given by instant shown...
- Q 1 Two protons each having kinetic energy K move towards each other from infinitely large separation Assuming a proton to be a sphere having radius equal to 1 fermi the...
- Q 2 Consider the situation shown in figure The wire AB is slide on the fixed rails with constant velocity v If the wire AB is replaced by a semicircular wire...
- Q A solenoid has an inductance of 10 henry and a resistance of 2 Q It is connected to a 10 V battery Time taken for t magnetic energy to reach...
- Q Question The magnitude of emf induced in a 2 mH inductor in which the current changes from 8 A to 6 A in 10 sece 2 x 10 6 V...
- Q Two wires are of same length and same area of cross section If first wire has resistivity p and temperature coefficient of resistance a but second wire has resistivity p...
- Q 120 The number N of scattered a par versus scattering angle 0 graph for a particle scattering experiment obtained by Geiger and Marsden is best represented by NA 1 3...
- Q A ballon start rising from the surface of the earth The ascent rate is constant and is equal to vo Due to the wind the balloon gathered the horizontal velocity...
- Q A thin bar magnet of length 24 and magnetic moment M is bent at the mid point so that the angle between the two halves is 60 The new magnetic...
- Q Phy Section A This section contains 35 SINGLE CORRECT TYPF questions Each question has 4 Read More A bulb is first connected across a 10 V DC supply and then...
- Q Which of the following statements are true a Magnetic field is produced by moving electric charge b Magnetic poles are only mathematical assumptions having no real existence c A north...
- Q 61 If mass of electron is equal to 1840 mass of proton then energy of y photon required for the pair production of an electron and positron is 1 Less...
- Q The magnetic field due to a small bar magnet in equatorial position is B the magnitude of magnetic field at the sax distance at axial position will be O O...
- Q In semiconductors at a room temperature A The valence band is partially empty and the conduction band is partially filled B The valence band is completely filled and the conduction...
- Q 9 Which of the following graphs may represent 125 the relation between the capillary rise h and the radius r of the capillary h d W b a C A...
- Q 06 The maximum and minimum magnitudes of the resultant of two given vectors are 17 and 7 respectively If these two vectors are at right angles to each other the...
- Q Question No In a bar magnet angle between the magnetic axis and magnetic moment is choose the best possible answ OO 0 60 90 120
- Q In Young s double slit experiment using a light of wavelength 2 60 fringes are seen on a screen It the wavelength of light is decreased by 50 ther the...
- Q 1 In the fusion reaction H H He ont The masses of deutrons helium and neutron expressed in amu are 2 015 3 017 and 1 009 respectively If 1...
- Q 128 The angle of dip at a place is 60 At this place the total intensity of earth s magnetic field is 0 64 units The horizontal intensity of earth...
- Q A parallel piate capacitor is filled with two dielectrics as shown in the diagram The area c plates is A and the distance between the plates is d If the...
- Q 24 A convex a concave lens are brought in close contact along their optical axes The focal length of the convex lens is 10 cm When the system is placed...
- Q 113 The critical angle for total internal reflection of light going from medium I to medium II is given by the relation tan ic 5 9 The refractive index of...
- Q 103 A nucleus of mass M is at rest An alpha particle of mass m is emitted from the nucleus with momentum P Q value of the nuclear reaction is...
- Q If a charged particle enters perpendicularly in the uniform magnetic field then 1 Energy remains constant but momentum changes 2 Energy and momentum both remains constant 3 Momentum remains constant...
- Q 133 The system shown in figure is just on the verge of slipping The coefficient of static friction between the block and table top is 40 N A 0 5...
- Q 124 A convex a concave lens are brought in close contact along their optical axes The focal length of the convex lens is 10 cm When the system is placed...
- Q A uniform rod of mass m and length l is suspended horizontally by the means of two vertical light inextensible strings at the ends c rod Tension in one string...
- Q Water in a tank is filled to a depth H whose side walls are vertical A hole is made on one of the walls at a depth h below the...
- Q Rain is falling vertically with a speed of 4 ms After some time wind starts blowing with a speed of 3 mx in the north to south direction In order...
- Q Two stones are projected with the same speed but making different angles with the horizontal Their ranges are equal If the angle of projection of one is 3 and its...
- Q A current of 5A exists in a 10 resistance for 4 minutes The number of electrons and charge in coulombs passing through any section of the resistor in this time...
- Q A pendulum of mass m and length is suspended from the ceiling of a trolley which has a constant acceleration a in the horizontal direction as shown in figure Work...
- Q A potentiometer wire AB is 100 cm long and has a total resistance of 10 ohm If the galvanometer shows zero deflection at the position C then find the value...
- Q What is the capacitance of the capacitor of square plates of area A Shown in figure P K A B Q E A K K 4d K K Eo A...
- Q 35 The current through a wire changes with time according to the equation I The correct value of the rms current within the time interval t 2 to t 4s...
- Q In a certain double slit experimental arrangement interference fringes of width 1 0 mm each are observed when light of wavelength 5000 is used Keeping the set up unaltered if...
- Q A black body radiates maximum energy at wavelength A and its emissive power is E Now due to change in temperature of that body it radiates maximum energy at wavelength...
- Q 5 The arc AB with the long wire having linear charge density are lying in the same plane The minimum amount of work to be done to move a point...
- Q A monoatomic gas of presuure P having volume V expands isothermally to a volum 2V and then adiabatically to a volume 16V The final pressure of the gas i 5...
- Q A particle of mass 3m is projected from the ground at some angle with horizontal The horizontal range is R At the highest point of its path it breaks into...
- Q A ball is dropped from a height of 20m and rebounds with a velocity which is 3 4th of the velocity with which it hits the ground What is the...
- Q 130 A block of mass M is allowed to slide down a fixed smooth inclined plane of angle 8 and length What is the power developed by the force of...
- Q A car is moving with a velocity of 157 7 5 m s and a biker is moving with a velocity of 12 4 5 m s Find the velocity...
- Q A particle is travelling along a straight line OX The distance x in metre of the particle from O at a time t is given by 21 36t 3t where...
- Q A point moves along a circle with velocity v at where a 0 5 m sec Then the total acceleration of the point at the moment when it covered 1...
- Q 105 Two waves are represented by Y a cos t kx and y a2 sin ot kx 1 3 Then the phase difference between them is B 7 7 2...
- Q 17 A charge Q is uniformly distributed over the surface of two concentric conducting spheres of radii R and r R r Such that surface charge densities are same for...
- Q 08 Temperature of a diatomic gas is 300 K I moment of inertia of its molecules is 8 28 10 38 gm cm root mean square angular velocity is A...
- Q 23 The compound unstable nucleus U often decays in accordance with the following reaction 226 U 140 Xe Sr other particles 92 38 Here the other particles are A An...
- Q If P is radiation pressure c represents speed of light and Q is radiation energy striking a unit area per second then non zero integers x y and z such...
- Q 4 A force exerts an impulse I on a particle changing its speed from u to 2u The applied force and the initial velocity are oppositely directed along the same...
- Q The electric potential changes from 10 V to 30 V as one moves along x axis from x 0 to x 2 m The magnitude of electric field in the...
- Q A hollow cylinder having infinite length and carrying uniform current per unit length 2 along the circumference shown Magnetic field inside the cylinder is 1 lool A Hod 2 C...
- Q Two wheels P and Q are mounted on the same axle The moment of inertia of P is 6 kg m2 and it is rotating at 600 rotations per minute...
- Q Which of the following statement is false for a perfect conductor in electrostatic condition The surface of the conductor is an equipotential surface The electric field lines just outside the...
- Q The equivalent capacitance of the circuit shown in the figure between terminals A and Bis C C 5 A 05 2C 0 200 5 3C 5 C C B
- Q 00 A Carnot engine whose sink is at 300 K has an efficiency of 40 By how much the source temperature should be changed so as to increase the efficiency...
- Q For measuring potentiometer because voltage of any circuit is preferred to voltmeter The potentiometer is cheap and easy to handle Calibration in the voltmeter is sometimes wrong The potentiometer draws...
- Q 2 Consider the cyclic process ABCA on a sample of 2 0 mol of an ideal gas as shown in fig The temperature of the gas at A and B...
- Q bimetallic strip is made of aluminium and steel aal asteel then on hea e strip will Aluminium Steel ORemain straight Get twisted O Will bend with aluminum on concave side...
- Q Three masses 2 kg 7 kg and 4 kg are connected to each other with threads and are placed on a table as shown in the figure The masses of...
- Q If n 1 then the dependence of frequency of a photon emitted as a result of transition of electron from nth orbit to n 1 th orbit on n will...
- Q The ratio of specific heat at constant pressure to specific heat at constant volume Y for a gas is 1 where f is the number of degrees of freedom of...
- Q 16 An anisotropic material has coefficient of linear thermal expansion a1 a2 and a3 along x y and z axis respectively Coefficient of cubical expansion of its material will be...
- Q For an isolated uniformly charged spherical Conductor the electrostatic Potential is zero everywhere inside the conductor Field is zero inside the conductor Field is non zero and uniform inside conductor...
- Q 03 In a vernier callipers ten smallest divisions of the vernier scale are equal to nine smallest 10 division on the main scale If the smallest division on the main...
- Q Two wires of same material length 2 and area of cross section A and 2A respectively are connected is series to cell The ratio of potential drops across the resistance...
- Q A spherical ball of radius R is floating at the interface of two liquids with densities p and 2p The volume of the ball immersed in the two liquids are...
- Q When an object floating in a liquid is in stable equilibrium then its centre of Duoyancy should be Horizontally in line with its centre of gravity O Vertically below its...
- Q Calculate the active and reactive components of current in each phase of a star connected 10 000 volts 3 phase generator supplying 5 000 kW at a lagging p f...
- Q A truck is traveling south at a speed of 53 km h toward an intersection A car is traveling east toward the intersection at a speed of 60 km h...
- Q Which of the following statement is true A catalyst alter Gibbs energy of a reaction The action of the catalyst cannot be explaine by intermediate complex theory O A catalyst...
- Q shown positi in the figure When switch S is turned to 2 the percentage of its stored energy dissipated is V v 1 20 3 40 1 F 26 4...
- Q A solenoid resistance battery Time taken for the magnetic energy reach 1 4 th of its maximum value has an inductance of 10 henry and of 2 Q It is...
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