Physics question and answers for August 14, 2024
- Q Two identical cells are connected in a series b parallel then maximum power transfered to the load is 1 Same in both cases 2 Different in both cases 3 May...
- Q The force of interaction between two atoms is given by XP 2 where x is the distance k is the F a exp 2 a M L T 2 c...
- Q Question 12 A Xt Yt 2 The radioactivity of a sample is X at a time t and Y at a time t If the mean life of the specimen...
- Q At time t 0 a 2290 kg rocket in outer space fires an engine that exerts an increasing force on it in the x direction This force obeys the equation...
- Q A stationary hydrogen atom in the first excited state emits a photon If the mass of the hydrogen atom is m and its ionization energy is E then the recoil...
- Q pop The magnetic field intensity at the point O of a loop with current i whose shape is illustrated below is b 16 3 1 4T 2a Hoi 3 2...
- Q Bodies of masses 4Kg and 2Kg are attached at the ends of a massless rod The positions of 4Kg and 2Kg are position of centre of mass of the system...
- Q AB is a wire of potentiometer With the increase in the value of resistance R the shift in the balance point J will be E www A H 1 towards...
- Q 4 None of the above A piece of copper and other of germanium are cooled from room temperature to 100 K 1 Conductivity of copper increases and that of germanium...
- Q A uniform bar of length 6a mass 8m lies on a smooth horizontal table Two point masses m 2m moving in the same horizontal plane with speeds 2v and v...
- Q Two particles are attached to light s tring the masses are rotated at const ant angular speed of 5 Radian per se cond about a point A the surface is...
- Q A planet moves around the sun along an ellipse so that its minimum distance from the sun is equal to r and the maximum distance to R Making use of...
- Q If you apply the same 50 N force at the halfway point at 12 cm point instead of the 24 cm point between the center of the bolt and the...
- Q 3 PA PB Which of the following statements is true about stationary waves 1 All particle except particles at node execute SHM 2 All particles except particles at node come...
- Q 5 With the usual notation the following equation 1 S u a 2t 1 is 1 Only numerically correct 2 Only dimensionally correct 3 Both numerically and dimensionally correct 4...
- Q Average speed of a bus measured by six different students is given as follows Student number Speed m s 1st 12 5 m s Column l Mean absolute error A...
- Q In the cube of side a shown in the figure the vector from the central point of the face ABOD to the central point of the face BEFO will be...
- Q A car is traveling 32 m s down a level road where Earth s magnetic field 5 0 x 10 5 T points north with an angle of 38 What...
- Q The square of the resultant of 4N and 3N exceeds the square of the resultant of the two forces by 12 when they are mutually perpendicular The angle between the...
- Q A charged particle is projected in air horizontally near the earth s surface at a point where horizontal component of magnetic field s absent Considering the effect of vertical omponent...
- Q The figure shows the plot of M 1 T T 3 T T PV vs P for oxygen gas at two different temperatures then nT PV nT 2 P more...
- Q The position of a particle moving along the X axis is given by X 18 0 t 2 2 0 t 3 where X is in meters and t in...
- Q 4 Internal energy per mole 23 The internal energy of 10 g of nitrogen at N T P is about 24 1 2575 J 3 3721 J The mean free...
- Q A ball is dropped down from the roof of a building and stimulus three are there ball is thrown in a horizontal direction when will the balls reach the ground...
- Q 4 The resultant of two vectors P and Q is R If the magnitude of Q is doubled the new resultant becomes perpendicular to P Then the magnitude of R...
- Q 3 The maximum electric field at a distance of 10 m from an isotropic point source of light is 3 0 Vm Calculate a the maximum value of magnetic field...
- Q 2 A 20 kg cotton warp having moisture regain of 8 5 is sized with a paste of 15 concentration If a 10 add on the bone dry weight of...
- Q Pre 13 The brightness of light bulb when a heating appliance is switched on will 1 decrease for non ideal source but remain same for ideal source 2 Increase for...
- Q A body hangs from a spring balance supported from the roof of an elevator a If the elevator has an upward acceleration of 2 45 m s and the balance...
- Q Two metal rods are fixed end to end between two rigid supports as shown in figure Each rod has length L and area of cross section is A When the...
- Q 2 A particle moves towards east with velocity 5 m s After 10 seconds its direction changes towards north with same velocity The average acceleration of the particle is CPMT...
- Q 2 2 Initial charges with proper sign on the plates of two identical capacitors each of 1 F are as shown When both and S are closed the potential difference...
- Q A neutron of kinetic energy K undergoes a head on collision with a hydrogen atom at rest in ground state and is free to move k Neutron Then mark the...
- Q A ring of radius R 8m is made of a highly dense material Mass of the ring is mR 2 7 x 10 kg distributed uniformly over its circumference A...
- Q 5 In a potentiometer the null point is received at 7th wire If now we have to change the null point at the 9th wire what should we do 1...
- Q 64 Thermal Properties of Matter The coefficient of linear expansion of a crystalline substance in one direction is 2 10 C and in every direction perpendicular to it is 3...
- Q Two vectors A and B have equal magnitudes The magnitude of A B is n times the magnitude of A B The angle between A and B is JEE Main...
- Q A bistable multivibrator with a saturation voltage 5V is shown in the diagram The positive and negative threshold at the inverting terminal for which the multivibrator will switch to the...
- Q of a metre resistance two The resistance 3 17 The potential difference between points A and B in the circuit shown in figure 3 318 will be esistance A 1V...
- Q A particle moves from the point 2 01 4 0 m at t 0 with an initial velocity 5 01 4 0 ms It is acted upon E a constant...
- Q 31 A cylindrical rod has temperatures T and T at its ends The rate of flow of heat is Q cal s If all the linear dimensions are doubled keeping...
- Q 9 In the figure the bigger block A has a mass of 40 kg and the upper block B is of 10 kg coefficient of friction between all surfaces of...
- Q 55 A circular plane sheet of radius 10 cm is placed in a uniform electric field of 5 x 105 N C making an angle of 60 with the field...
- Q 15 Find the focal length of a plano convex lens when curved surface is silvered and the object is in front of plane surface A f behaves as concave mirror...
- Q 7 Force F is acting on a particle of mass m as shown in the force time curve The change in momentum of the particle over the time interval of...
- Q 2 A small block B is placed on another block A of mass 5 kg and length 20 cm Initially the block B is near the right end of block...
- Q Figure shows a metallic square frame of edge a in a vertical plane A uniform magnetic field B exists in the space in a direction perpendicular to the plane of...
- Q 4 Two blocks of masses m 2 0 and m 1 0 kg are in contact on a frictionless table A horizontal force N 3 0 N is applied to...
- Q 2 8 A capacitor of capacitance of 2 F is charged to a potential difference of 200V after disconnecting from the battery it is connected in parallel with another uncharged...
- Q potential energy at any palace we ca nnot calculate potential energy at sp ecific space So give option a I think option d is right A positive charge is moved...
- Q A glass block measured 5 cm x 5 cm x 15 cm When block stands on one of its smaller faces and viewed directly from above it appear to be...
- Q If the potential difference of Coolidge tube producing X ray is increased then choose the correct option s The interval between Aka and Akp increases The interval between Aka and...
- Q Two cells of unequal emf E and E having 2 internal resistance r and r are connected as shown in figure E r E 1 Potential difference across any of...
- Q 3 3 4 6 23 If a gas has degree of freedom the ratio of the specific heats of the gases 1 3 1 f 2 C C 2
- Q Two masses m and m are suspended together by a massless spring of constant K as shown in figure When the masses are in equilibrium m is removed without disturbing...
- Q of a metre resistance e two The resistance 3 17 The potential difference between points A and B in the circuit shown in figure 3 318 will be esistance A...
- Q the bigge A Sh wedge of mass M slides or wedge initially resting on the smooth horizonta ground as shown in the figure The mass of the bigger wedge is...
- Q 4 Any value Two identical bar magnets each of same length and magnetic moment one bent into a semicircular are placed as shown If the angle made by the resultant...
- Q A box of negligible mass containing 2 moles of an ideal gas of molar mass M and adiabatic exponent y moves with constant speed v on a smooth horizontal surface...
- Q Two parallel conductors carrying current in the same direction attract each other while two parallel beams of electrons moving in the same irection repel each other Which of the ollowing...
- Q The mean of marks obtained in an examination by a group of 100 students was found to be 49 96 The mean of the marks obtained in the same examination...
- Q A compartment of a train is lit by 20 identical 8 bulb in series one of the bulbs fuses and is removed from the chain The remaining bulbs now light...
- Q MCQs 1 A man of 60 kg weight is standing at rest on a platform He jumps up vertically a distance of 1 m and the platform at the same...
- Q The molar specific heat at constant pressure of an ideal gas is 7 2 R The ratio of specific heat at constant pressure to that at constant volume is 2...
- Q 4 None of the above 20 If charges moved without collisions through 20 the conductor their kinetic energy would also change so that the total energy is 1 Changed 3...
- Q A car is moving on a straight road covers one third of the distance with a speed of 20 km h and the res a speed of 60 km h...
- Q Three identical discs A B and C as shown in the figure rest on a smooth horizontal plane The disc A is set in motion with velocity v after which...
- Q If the energy input to a Carnot engine is thrice the work it performs then the fraction of energy rejected to the sink is opone 1850 30 Kerala CEE 2015...
- Q 23 Interference fringes were produced in YDSE using light of wavelength 5000 A When a film o transparent material with 2 5 x 10 3 cm thicknes was placed over...
- Q 4 A particle of mass m and charge q approaches from a very large distance towards a uniformly charged ring of radius R and charge mass same as that of...
- Q Board Competitive Exams 14 When pressure remaining constant at what temperature will the r m s speed of a gas molecules increase by 10 of the r m s speed...
- Q Consider a cube of side a 0 1 m placed such that its six faces are given by equations x 0 x a y 0 y a z 0 and...
- Q PHYSICS Which of the following statements is are correct about the refraction of light from a plane surface when light ray is incident from denser medium C is critical angle...
- Q 3 3 x 10 c 4 Data is insufficient A metallic tape gives correct value at 25 C A piece of wood is being measured by this metallic tape at...
- Q 15 The massless inextensible string connecting the slider A and mass B passes over two small massless smooth pulleys one of which is attached to A One of the ends...
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