Physics question and answers for September 11, 2024
- Q A simple pendulum has time period T The point of suspension is now moved upward according to the relation y Kt K 1 m s where y is the vertical...
- Q 2 While walking on ice one should take small steps to avoid slipping This is because smaller steps ensure a larger friction b smaller friction c larger normal force d...
- Q Q1 The end Q and R of two thin wires PQ and RS are soldered joined together Initially each of the wires has a length of 1 m at 10...
- Q An electric field line emerges from a positive point charge q at an angle a to the 91 91 Fig 74 FLO straight line connecting it to a negative point...
- Q Astronomical unit AU is the average distance between the earth and sun approximately 1 5 10 km The speed of light is about 3 0 108 m s The speed...
- Q The time period of small oscillation of a uniform rod of length smoothly hinged at one end The rod oscillates in vertical plane
- Q 10 A system consists of two identical blocks each of mass m connected by a massless spring of force constant k Initially the system is in equilibrium as shown in...
- Q of the pile on the bottom of the pond Given u of water 4 3 2 A swimming pool of depth D has a plane mirror like bottom It is...
- Q Ex A point source S is placed at distance of 15 cm from a converging lens of focal length 10 cm Where should a i concave mirror ii convex mirror...
- Q i A mass m is connected by a weightless cable passing over a frictionless pulley to a container of water whose mass is m at t 0 If the container...
- Q of its image when it is viewed from the direction of B Ans at A 18 Paraxial rays from an infinitely distant object are incident on the surface of a...
- Q 3 a A particle of mass m strikes elastically with a disc of radius R with a velocity v as shown in the figure If the mass of the disc...
- Q The moment of inertia of a thin uniform rod of mass M and length L about an axis passing through its midpoint and perpendicular to its length is Io Its...
- Q 34 The magnetic field at a point P consists of the terrestrial magnetic field and the field produced by current of 9 A flowing through a long straight conductor How...
- Q A man of 50 kg mass is standing in a gravity free space at a height of 10 m above the floor He throws a stone of 0 5 kg...
- Q 11 1 1 1963 X 10 23 A battery is connected with a tangent galvanometer and a resistance in series and the deflection of the galvanometer is 60 On placing...
- Q In the given p V diagram find a pressures at c and d b work done in different processes separately c work done in complete cycle abcd 90101 910 Solution...
- Q 36 Determine the electric field strength vector if the potential of this field depends on x y coordinates as a a x y b axy where a is a constant...
- Q 12 A horizontal force of 10 N is necessary to just hold a block stationary against a wall The coef ficient of friction between the block and the wall is...
- Q on external magnetic 4 No field lines exists inside the magnet A magnetic needle lying parallel to a magnetic fiel requires W units of work to turn it through 60...
- Q on the bob Ans 16 4 Three charges 27 125 and 64 C are situated at the corners A B and C respectively of a rectangle ABCD having sides AB...
- Q I I T 73 Ans 1 414 i 45 r sin 1 3 4 7 The dispersive power of crown and flint glasses are 0 03 and 0 05 respectively...
- Q Fig 3 4 40 A point dipole with an electric moment p oriented in the positive direction of the z axis is located at the origin of coordinates Find the...
- Q 30 Three forces start acting simultaneously on a particle moving with velocity v These forces are represented in magnitude and direction by the three sides of a triangle ABC as...
- Q 6 Ionization potential of hydrogen atom is 13 6 el Hydrogen atom in ground state is excited by monochromatic light of energy 12 1 eV The spectra lines emitted by...
- Q D The frequency of oscillation of an electric dipole moment having dipole moment p and rotational inertia I oscillating in a uniform electric field E is given 1 1 2...
- Q A particle execute S H M with frequency f Find frequency with which its kinetic energy oscilla A particle of mass 10g is placed in potential field given by V...
- Q EX Two strings of length 0 5 m each are connected to a block of mass m 2 kg at one end and their ends are attached to the point...
- Q Q 6 Two H atoms in the ground state collide inelastically The maximu amount by which their combined kinetic energy is reduced is d 27 2 eV a 10 20...
- Q Answer questions 11 12 and 13 by appropriately matching the information given in the three columns of the following table Three parallel plates A B C of large area carry...
- Q 1 water medium 60 45 If refractive index of water is 3 of unknown medium is 1 1 4 3 1 43 then refractive ind 2 1 73 4 1...
- Q with macroscopic i e large When a glass rod is rubbed with a silk cloth charges appear both A similar phenomenon is observed with many other pair bodies Explain how...
- Q Light from a point source in air falls on a convex spherical glass surface n and radius of curvature 20 cm The distance of the light source from the gla...
- Q 3 Two blocks A and B of mass mA and mg are connected together by means of a spring and are resting on a horizontal frictionless table The blocks are...
- Q The distance at which average radius of the earth orbi subtends an angle of 1 arc second is b Astronomical unit d Unified atomic unit J KC a Parsec c...
- Q The equation of trajectory of a projectile is given by 40 x where y is vertically upwards If R y 4x 39 is range and 9 is angle of projection...
- Q A train is moving towards east at a speed of 20 m s A bullet fired westward with a velocity of 180 m s crosses the train in 1 5...
- Q Three charges q q and q are kept at the corners of an equilateral triangle of side d Find the resultant electric force on a charge q placed at the...
- Q A nuclear fusion reaction is given below H H He n 3 2 MeV A How much energy will be generated when 2 kg of deuterons are fused approx 1...
- Q A particle performing S H M is found at its equilibrium at t 1 s and it is found to have a speed of 0 25 m s at t...
- Q lustration 8 A progressive wave having amplitude 5 m and wavelength 3 m If the maximum average velocity of particle in half time period is 5 m s and wave...
- Q Example 9 12 a The near point of a hypermetropic person is 75 cm from the eye What is the power of the lens required to enable the person to...
- Q The position of a particle is given by r 3ti 2t j 1k m where t is time in second and the coefficients have the proper unit for 7 to...
- Q A particle is suspended vertically from a point O by an inextensible massless string of length L A vertical line AB is at a distance L 8 from O as...
- Q Imp A red LED emits light at 0 1 watt uniformly around it The amplitude of the electric field of the light at a distance of 1 m from the...
- Q 3 A glass slab of thickness t 3 cm R I 2 between the object O and the concave mirror of focal lengthIf 4 5 cm It is observed that...
- Q A particle is dropped from a balloon rising at 20 m s 1 at a time when the balloon is 80 m above the ground If g 10 m s...
- Q A ball is projected from a point O with some velocity Vo at an angle 30 with the horizontal as shown in the figure Consider a target at point Q...
- Q Example 22 13 A cylinder of radius R made of a material of conductivity K is surrounded by a cylindrical shell of inner radius R and outer radius 2R made...
- Q 12 In the given circuit charge Q on the 2uF capacitor changes as C is varied from 1pF to 3pF Q as a function of C is given properly by...
- Q A person reaches exactly opposite point on the bank of a river if he starts swimming with a speed of 9 kmph at an angle 120 with the direction of...
- Q 17 A solid body of constant heat capacity 1 J C is being heated by keeping it in contact with reservoirs in two ways 1 Sequentially keeping in contact with...
- Q 18 Consider a spherical shell of radius R at temperature T The black body radiation inside it can be considered as an ideal gas of photons with internal energy per...
- Q 11 An LCR circuit is equivalent to a damped pendulum In an LCR circuit the capacitor is charged to Qo and then connected to the L and R as shown...
- Q Two equal and oppositely charged particles are kept at some distance apart from each other A spherical surface having radius equal to separation between the particles and concentric with their...
- Q A pendulum made of a uniform wire of cross sectional area A has time period T When an additional mass M is added to its bob the time period changes...
- Q lar loop of sides 10 cm and 5 cm carrying a current 1 of 12 A is placed in different orientations as shown in the figures below A B C...
- Q 9 Two stones are thrown up simultaneously from the edge of a cliff 240 m high with initial speed of 10 m s and 40 m s respectively Which of...
- Q 5 Charges 2 Q and Q are placed as shown in figure The point at which electric field intensity is zero will be 2Q E a somewhere between Q and...
- Q A conducting circular loop of radius r carries a constant current i It is placed in uniform magnetic field B such that B is perpendicular to the plane of the...
- Q Apparent weight of a man in lift Case I If the lift is at rest or moving uniformly a N mg So Wapp Wapp W actual Case II If the...
- Q Distance of the centre of mass of a solid uniform cone from it If the radius of its base is R and its height is vertex is ZO then Zo...
- Q A square wave current switching rapidly between 0 5 ampere and 0 5 ampere is passed through an AC ammeter Then the reading shown by it is A 0 25...
- Q 4 All of these 5 A semicircular wire PQS of radius R is connected to a wire bent in the form of a sine curve to form a closed loop...
- Q 7 6 Two long current ca plane as shown in the figure Magnitude of net magnetic field at centre point O is Radius of circular parts is R L 1...
- Q MATCHING TYPE WITH 3 COLUMNS 4 ROWS he following table has 3 columns and 4 rows Based on table there are THREE questions Each question has FOUR options 4 B...
- Q Solid cylinder r 5 cm 30 A solid cylinder of radius 5 cm is pure rolling o 30 inclined plane Find out angular velocity afte it travels 6m on incline...
- Q Assuming human pupil to have a radius of 0 25 cm and comfortable viewing distance of 25 cm the minimum separation between two objects that human eye can resolve at...
- Q A cubical block is floating in a liquid with one third of it s volume immersed in the liquid When the whole system accelerates upwards with acceleration of g 2...
- Q The intensity of gamma radiation from a given On passing through 36 mm of lead it is reduced to 8 urc be a 9mm b 6mm c 12mm I I...
- Q Two men A and B are standing on a plank B is at the middle of the plank and A is at the left end of the plank Bottom surface...
- Q mp a 1 62 36 d 1 4 b 1 59 c 1 54 In a common base amplifier the phase difference betwe the input signal voltage and output voltage...
- Q 0 If a simple harmonic motion is represented by dt its time period is a 2 a b 2T a d x 2 c 2 ax 0 d 2
- Q 37 The diagram shows the energy levels for an electron in a certain atom Which transition shown represents the emission of a photon with the most energy a IV I...
- Q Two point charges 8q and 2q are located at x 0 and x Lrespectively The location of a point on the x axis at which the net electric field due...
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