Physics question and answers for September 15, 2024
- Q 5 Two thin concentric hollow conducting spheres of radii R and R bear charges Q and Q respectively If R R then the potential of a point at a distance...
- Q At NTP water boils at 100 C Deep down a mine water will boil at a temperature B 100 C 100 C Correct Answer 100 C
- Q A mercury manometer figure 24 W1 consists of two unequal arms of equal cross section 1 cm and lengths 100 cm and 50 cm The two open ends are sealed...
- Q A particle moves along a x axis according to given function x t 10 t 10t Find the average velocity of particle in time interval from t 0 to t...
- Q 11 cc of water at its boiling point 100 C absorbs 540 cal of heat to become steam with a volume of 1671 cc If the atmospheric pressure is 1...
- Q 0 75Gm R from the A missile is launched at an angle of 60 to the vertical with a velocity surface of the earth Neglecting air resistance find the maximum...
- Q ody is allowed to roll down inclined plane Th acceleration of centre of mass of body will depend 1 Mass of the body X 2 Radius of the body 3...
- Q A ball strikes a wall with a velocity u at an angle 0 with the normal to the wall surface and rebounds from it at an angle with the surface...
- Q A very long cylinder is carrying a current lo distributed uniformly over its cross section area as shown in the figure Find the value of fB de along the path...
- Q stration 5 2 Assume that if the shear stress in steel exceeds about 4 00 x 108 N m the steel reptures Determine the shearing force necessary to a shear...
- Q The value of magnetic field at O is 1 2 1 Zero Hol 2 2a 3 1 Hoi 4 none of these a a 0 vi 2
- Q For any 81x Let a1 a2 a3 be a sequence of real numbers such that lim an real number x define an integer valued function f x as the smallest...
- Q The graph shows position as a func tion of time for two trains running on parallel tracks Which statement is true Position A B Time a At time tg both...
- Q 25 The successive frequencies of standing waves setup in an organ pipe are 150 Hz 225 Hz 300 Hz then frequency of 10th harmonics is 1 1500 Hz 2 750...
- Q A current of magnitude 1000 005 mA is entering and simultaneously a current of 1000mA is leaving a metallic sphere of radius 20 cm Find the time at which potential...
- Q 3 A tuning fork A produces 3 beats per second with tuning fork B On loading tuning fork B with wax beat frequency remains unchanged If frequency of tuning fork...
- Q 3 In a cylindrical region uniform magnetic field which is perpendicular to the plane of the figure is increasing with time and a conducting rod PQ is placed in the...
- Q Find the distance of centre of mass of the uniform rod of length into circular arc of radius R from the centre C as shown 3R B 2R A C...
- Q Explain with the help of a labelled circuit diagram how you will find the resistance of a combinatio of three resistors of resistances R R and R3 joined in parallel...
- Q m m The magnitude of normal reaction between the blocks is
- Q 1 Consider two npn transistors as shown in figure If 0 Volts corresponds to false and 5 Volts correspond to true then the output at C corresponds to Online April...
- Q tration 10 A heater is designed to operate with a power of 1000 W in a 100 V line It is connected in combination with a resistance R to a...
- Q When radiation of frequency 3 x 1015 Hz incident on a metallic surface having work function 4 eV The minimum velocity of photoelectron is 1 1 72 x 106 ms...
- Q 19 The current through the 5 resistor is 522 www a 10 A 8 V b 1 A 6 V www 99 4 V c 2 5 A d 0...
- Q A ball is thrown up with a certain velocity at angle 0 to the horizontal The kinetic energy KE of the ball varies with horizontal displacement x as 1 3...
- Q View In English The system is pushed by a force F as shown in figure All surfaces are smooth except between B and C Friction coefficient between B and C...
- Q 1 14 Two monochromatic sources of light of same power emit photons of different frequencies 8 and 8 corresponding momenta energies and number of photons emitted per second are P...
- Q A block is projected up along the line of greatest slop of an inclined plane of angle of inclination 0 0 wher o angle of friction Which of the following...
- Q The magnetic field of a cylindrical mag net that has a pole face radius 2 8 cm can be varied sinusoidally between the minimum value 16 8 T and the...
- Q as shown in figure The velocity time will have a shape a a m s and undergoes an acceleration graph from figure L b VI VA
- Q om rest and undergoes an acceleration 131 A particle as shown in figure The velocity time graph from figure will have a shape a c VA a m s a...
- Q A person is standing in front of a plane mirror at a distance L from mirror and observes image of wall of height H at a distance of 3L behind...
- Q A proton and an alpha particle are accelerated through the same potential difference The rati of wavelengths associated with proton and alph particle respectively is 212 1 3 2 5...
- Q A series LCR circuit contains a 50 resistance 2H inductane and F capacitance 800 19T T connected across a 220V 50Hz ac source The net reactance of the circuit is...
- Q AB is a surface making an angle of 30 with horizontal A is 6 3 m above the ground while B is 3 8 m above the ground A 35...
- Q First Law of Thermodynamics and Specific Heat Capacity 2018 A sample of 0 1 g of water at 100 C and normal pressure 1 013 x 105 N m2 requires...
- Q 36 a What is the potential of point a with respect to point b in figure when switch S is open V 18 0 V 6 00 S 3 00...
- Q A point object is located at a distance of 100 m from a screen A lens of focal length 23 cm mounted on a movable frictionless stand is kept between...
- Q the values of two resistances are and R 10 0 0 1 The when they are connected in parallel In an experiment R 5 0 0 2 total resistance is...
- Q Q 16 4 1 01 13 A particle is projected in a region where an electric field E E with a velocity from the origin at times t 0 If...
- Q n e C 48 A uniform horizontal rod of length 40 cm and mass 1 2 kg is supported by two identical wires as shown in figure 15 E9 Where...
- Q 1 A particle with total energy E is moving in a potential energy region U x Motion of the particle is restricted to the region when 1 U x E...
- Q 6 In the EM wave the amplitude of magnetising field H and the amplitude of electric field E at any place are related as 1 H Eo 3 H Eo...
- Q 19 Three conducting infinite plates are given having charge density o 20 and 4o respectively Electric field at point p is given by 1 20 Co 2 760 Co 20...
- Q A thin cir ying direction is lying in the x y plane with its centre at the origin A uniform magnetic field of strength B B 27 31 sk tesla...
- Q tion 25 A small block of mass m is attached to three springs with respective stiffness constants k k and ks see fig Find the period of oscillations if the...
- Q Example 10 39 Light source of wavelength 400 nm used in Lloyd s mirror lies 1 mm above the plane mirror Find the distance of first minima above the mirror...
- Q 9 Two masses M and M connected by means of a string which is made to pass over light smooth pulley are in equilibrium on a fixed smooth wedge as...
- Q D A straight wire of finite length carrying current subtends an angle of 60 at point P as shown The magnetic field at Pis ey 1 Hol 2 3TX 3...
- Q c S2 and 53 19 When sunlight is scattered by atmospheric atoms and molecules the amount of scattering of light of wavelength 440 nm is A The amount of scattering...
- Q A 4 00 uF capacitor and a 6 00 uF capacitor are connected in parallel across a 660 V supply line a Find the charge on each capacitor and the...
- Q 1 A cylindrical log of wood floats vertically in water with one fourth of its length out of water The density of wood is A 0 25 g cc B...
- Q An automobile travelling with a speed of 60km h can brake to stop within a distance of 20m If the car is going twice as fast i e 120km h...
- Q A sphere of diameter r is cut from a solid sphere of radius r such that the centre of mass of remaining part be at maximum distance from orginal centre...
- Q Q TUR4 r be the charge density distribution for a solid sphere of radius R and total charge Q For a point P inside the sphere at distance r from...
- Q Three charges of respective values 2 C 2 2 C and 2 C are arranged along a straight line as shown in the figure Calculate the total electric field intensity...
- Q A beam of electrons after being accelerated through a potential difference of 100 volts enters into a uniform magnetic field which is perpendicular to the plane of paper and directed...
- Q kk w wt Q Figure 10 23 b shows light reflected from a transparent medium say water As before the dots and arrows indicate that both polarisations are present in...
- Q A tube filled with water rotating with angular velocity w Find equation of curve so formed 5 cm 10 cm 5 cm Ans V 2x
- Q 2 A wire is bent in the form of an equilateral triangle of side 100cm and carries a current of 2A It is placed in a magnetic field of induction...
- Q Comprehension l Two trains A and B are moving with speeds 20 m s and 30 m s respectively in the same direction on the same straight track with B...
- Q B A tank with a square base of area 2 m is divided into two compartments by a vertical partition in the middle There is a small hinged door of...
- Q c 340 N d 6800 N A steel tape measures the length of copper rod as 90 00 cm when both are at 10 C the calibration temperature for the...
- Q 4 Initially spring is in its natural length Now a block of mass 0 25 kg is kept as shown Find out maximum force by system on floor when block...
- Q 3 An a particle is moving with the velocity v ul u in a uniform magnetic field B Bk Magnetic force on a particle is 2 euB i j 4...
- Q Out of the three conducting identical plates middle flat is given charge 3 C and other two plates are not having any charge If switch S is closed Find the...
- Q In an LCR circuit capacitance is changed from C to 2C For the resonant frequency to remain unchanged the inductance should be changed from L to 1 4L 3 L...
- Q 18 The surface density of a circular disc of radius a depends on the distance as p r A Br The moment of inertia about the line perpendicular to the...
- Q A particle of mass m is kept on a smooth cube of mass M and side L as shown in figure Cube start moving with a constant velocity v Displacement...
- Q A car has a fresh storage battery of e m f 12 V and internal resistance 2 x 10 2 2 If the starter motor draws a current of 80...
- Q 7 In the given figure net magnetic field at O will be a c 0 0 O a 0 i 2 oi 4 37 2 0 4 7 2a 0...
- Q During measurement of kinetic energy T the percentage error in measurement of mass of particle and momentum of particle are 2 and 3 respectively The percentage error in measurement of...
- Q Two charges of magnitude 5 nC and 2 nC one placed at points 2 cm 0 0 and x cm 0 0 in a region of space where there is...
- Q 29 The current flown through the battery connected with infinite network as shown in the figure is 10 V 1Q www 1 5 A 2 10 A 3 2 A...
- Q 2 A bar magnet of magnetic moment M is placed at a distance D with its axis along positive X axis Likewise second bar mag net of magnetic moment M...
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