Physics question and answers for August 21, 2024
- Q 7 BC D E F X The force acting on a particle constrained to move along x axis varies as shown Identify the correct option s 1 E is a...
- Q 4 Light of wavelength 800 nm is shone on a metal surface connected to a battery The work function of the metal is 1 25 eV Find the extinction voltage...
- Q Athin rod of length 2R is placed inside a smooth spherical shell of radius R The rod is vertical and i ends are in contact with the inner surface of...
- Q 2 The trajectory of a projectile in a vertical plane is y ax bx where a and b are constants and x and y respectively are horizontal and vertical distances...
- Q particles 1 and 2 are allowed to descend on the two frictionless chord OA and OB of vertical circle at the same instant from point O The ratio of the...
- Q 3 A particle is moving in a circle of radius 3 m with an angular velocity 2 radian per second in clockwise direction as shown Find acceleration of particle at...
- Q Why is centrifugal force called a pseudo force Calculate the centripetal force acting on a small mass of 0 25 kg rotating 1800 revolution min on a radius 200 mm...
- Q b What are the advantages of Newton s divided interpolation formula over the Langrage s formula The strength of concrete block at different time is shown in the table Calculate...
- Q Two wires of different densities are joined at x 0 An incident wave Asin K x ot traveling from left to right is partly transmitted and partly reflected from the...
- Q a The viscous force F on a spherical body moving through a liquid depends upon the velocity v of the body the radius r of the body and the co...
- Q 0 Can a dimensionless quantity have a unit Define Impulse of a force How is it related to momentum A 30 g bullet leaves a rifle with a velocity of...
- Q 1 To a man walking at the rate of 3km h the rain appears to fall vertically When he increases his speed to 6km h it appears to meet him...
- Q A dip needle vibrates in the vertical plane perpendicular to the magnetic meridian The time period of vibration is found to be 4 s The same needle then allowed to...
- Q C 5 State Hooke s law On what factors does the modulus of elasticity of a substance depend Define co efficient of viscosity and write down its SI unit What...
- Q c 0 28 A A conducting rod of 1m length and 1kg mass is suspended by two vertical wires through its ends An external magnetic field of 2T is applied...
- Q 49 Figure a shows a ring of mass m and figure b shows half portion of the same ring Gravitational field at point P in figure b is I2 in...
- Q 4 4 points The height of a ball dropped from the top of a building 224 feet high is given by h t 16t 224 where t is in seconds...
- Q The block in Fig 2 of mass m is pressed against the ideal spring of elastic constant k and compresses it by a distance d The block is released and...
- Q and at an 1 A projectile is launched with angle 0 with the horizontal The rate of change of speed and radius of curvature respectively at the highest point are...
- Q 84 In the figure shown the rod is uniform and has a mass m length L The horizontal thread is conner rod at a point at a distance L 3...
- Q Which of the following sets of vectors given below may have zerc resultant 12 14 28 14 18 36 O 11 22 17
- Q Calculate the moment of inertia of a disc of mass 0 4Kg and radius 0 12m about an axis passing through its center and at right angles to its plane...
- Q 81 Two waves of wavelengths and 2 A2 produce 6 beats sa 51 per second If M 9 find the speed of sound wave 2 in a gas in which...
- Q P In the circuit shown R R 10 0 and resistance per unit length of wire PQ 10 cm and length PQ 10 cm If R is made 200 then...
- Q One day in the morning Ramesh filled up 1 3 bucket of hot water from geyser to take bath Remaining 2 3 was to be filled by cold water at...
- Q An observer at distance r from point source observes intensity at decibal scale B dB Now eight coherent identical point source all are in same phase are placed at the...
- Q A current of 10 A is passing through an aluminium wire of cross sectional area 4x10 m The density of the aluminium conductor is 2 7 g cc Considering aluminium...
- Q Estimate how long it might take for ethyl alcohol to be detected 6 cm from a bottle after it opened assuming only diffusion is occurring Assume the diffusion constant is...
- Q A stone of mass 1kg tied to a light 10 inextensible string of length L 3m is whirling in a circular path of radius L in a vertical plane If...
- Q 0 2 mA oltage is fed to the amplifier with common emitter configuration as given by the equati Vin Vo sin 145t where t is time The output voltage from...
- Q 9 The electric potential V at any point x y all in metres in space is given by V 4x volt The electric field at the point 1 m 0...
- Q or j oE where o 1 p is called the conductivity Ohm s law is often stated in an equivalent form Eq 3 13 in addition to Eq 3 3...
- Q 27 During an adiabatic process the pressure of a gas is found to be proportional to the cube of its Gp for the gas is Gy PQ T v cont...
- Q A block of mass m is kept on disc at rest Disc starts rotating with constant angular acceleration a Friction between block disc in sufficient to prevent slipping Which of...
- Q 9 3 Two cylinders A and B fitted with pistons contain equal amounts of an ideal diatomic gas at 300 K Piston A is free to move and piston of...
- Q hich vector sum is equal to the vector A in the diagram IF B A C D B C D E C C F P B C D KAI C
- Q Current is flowing in a regular hexagon shaped loop of side length a Find expression for magnetic field at the centre Only one correct answer A B C pol 20...
- Q A Young s double slit experiment is performed using monochromatic light of wavelength X The intensity of light at a point on the screen where the path difference is is...
- Q A light of wavelength 414 nm falls on a metal surface having work function 1 eV Kinetic energy of fastest moving electron will be hC 1242 eV nm Only one...
- Q For a sensitive potentiometer a the wire must be of small length b the external potential difference should be large c the wire must be of larger length d external...
- Q Force acting on a particle is F ayi Bxy j Find the work done in Joule by this force when particle is moved along the line 2x 3y from origin...
- Q Problem 3 Consider a trough of a semicircular cross section and an inclined plane in it that leads from a point A to point B lying lower than A Prove...
- Q al Electrostatic energy a Q 5n oa b Q 6n oa c 2Q 6ns a d Q 6n oa The volume charge density inside and outside a spherical charge distribution...
- Q The state of polarization of light with the electric field vector E Eocos kz wot j Eo cos kz wt is b linearly polarized at 45 to x axis a...
- Q A block of mass m is suspended from a spring Its frequency of oscillation is f The spring is cut into two identical halves and the same block is suspended...
- Q 1 Calculate the mass of ascorbic acid Vitamin C CH O to be dissolved in 75 g of acetic acid to lower its melting point by 1 5 C K...
- Q A particle of mass m as shown in figure Force F is being applied on trolley to move it on frictionless surface The angle 0 O O between string and...
- Q 1 T T 3 T T 2 T T 4 T 2T 2 The displacements of two particles executing SHM on the same line are given as y asin 2...
- Q INEET 2013 26 A gas is taken through they cycle ABC A as shown What is the net work done by the gas 0 7 6 6x5 X10 X 4...
- Q For finding the moment of inertia of a d isc with radius R we assume that the di sc is made up of many small rings of m ass dm...
- Q Let us plac shown in at M due identical conducting plate N parallel to it such that charge is induced on plate N a e If V is the potential...
- Q 26 The plot of velocity v versus displacement x of a particle executing simple harmonic motion is shown in figure The time period of oscillation of particle is 10 v...
- Q A ball is dropped from the top of a tower After 2s another ball is thrown vertically downwards with speed of 40 ms After how much time and at what...
- Q 4 The increase in internal energy of 1kg of water at 100 C when it is converted into steam at the same temperature and at 1 atmospheric pressure will be...
- Q Question 26 M M 4 00 Switch S is closed at t 0 to begin charging of uncharged capacitor of capacitance C 15 F through a resistance C R 2002...
- Q Oscillations 121 0 A particle is executing SHM with time period T Starting from mean position time taken by it to 5 complete oscillations is 1 3 T 12 5T...
- Q Wave Optics Questions with Answer Keys math The speed of electrons in a scanning electron microscope is 1 107 ms 1 If the protons having the same speed are used...
- Q 24 In single slit diffraction experiment first minima of red light A1 660 nm coincides with first maxima of other wavelength 2 What is the value of 1 440 nm...
- Q 0 At the first minimum adjacent to the central maximum of a single slit diffraction pattern the phase difference between the Huygen s wavelet from the edge of the slit...
- Q Question 22 20V M M 4 00 In the given circuit the value of R so that thermal power generated in R will be maximum in Q2 1092 www 30V...
- Q A block of mass 0 2 kg is suspended from the ceiling by a light string A second block of mass 0 3 kg is suspended from first block through...
- Q A projectile of mass M is fired so that the horizontal range is 4 km At the highest point the projectile explodes in two parts of masses M 4 and...
- Q The approximate compressibility and density of water is 10 kg m What fractional depth of an ocean is 2700m The of water is 45 4 x 10 Pa compression of...
- Q 2 Natural frequency of body 3 Difference of frequency of driving and natural frequency 4 Mean of driving force and natural frequency 18 Which of the following equation represents damped...
- Q and Three resistors having resistances r r2 r3 are connected as shown in the given circuit The iz ratio of currents in terms of resistances used 11 in the circuit...
- Q In Young s double slit experiment on the screen the 5th bright band due to one light of wavelength coincides with 6th bright band due to anothe light of wavelength...
- Q A steel wire of length 2 m is stretched through 2 mm What is elastic potential energy stored in a wire of cross sectional area 4 mm in stretched condition...
- Q Find accel Acceleration of free fall is g 7 An arrangement setup inside a lift is shown in the figure The pulleys and threads are ideal and masses of the...
- Q A 100 00 kg roller coaster car is pressed against a spring of constant 1 425 N m and compresses it 5 00 meters It is then released and rolls...
- Q The velocity distribution in a viscous flow over a plate is given by u 4y y for y 2m where u is velocity in m s at a point which...
- Q 4 atoms contains negatively charged particles 32 Graph of total number of a particles scattered at different angles is Number of a particles Number of 14 20 160 0 20...
- Q In Young s double slit experiment the intensity at a point where the path difference is being the wavelength of the light used is I If lo denotes the maximum...
- Q A gyroscope spins with its tip on the ground and is spinning with negligible frictional resistance The disk of gyroscope has mass 0 3 kg and is spinning at 2...
- Q A current i flows in a thin wire in the shape of a regular polygon with n sides The magnetic induction at the centre of the polygon when n is...
- Q For froyoun 1 One mole of an ideal monatomic process described by the equation pV3 constant The heat capacity of the gas during this process is NEET 201 312 a...
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