Physics question and answers for August 27, 2024
- Q The wire of a sonometer has a length of 1 m and mass 5 x 10 4 kg It has a tension of 20N IF the wire is pulled at...
- Q A bulb is placed at depth of 2 7 m in water and a floating opaque disc is placed over the bulb so that bulb does not appear visible from...
- Q How many number of maximas are formed on a finite screen in Young s double slit experiment given slit screen separation as 1 meter separation between slits 3 mm and...
- Q Ques 2 A particle of unit mass is projected vertically upward with a velocity u Assuming that the ir resistance is k times the instantaneous velocity of the particle show...
- Q A radioactive isotope A with a half life of 1 25 x 1010 year decays into B wh stable A sample of rock from a planet is found to contain...
- Q A charged particle q is placed inside a grounded metallic shell of inner and outer radii a and h respectively as shown in the figure The particle is at a...
- Q A monoatomic gas undergoes a polytropic process which is defined by expression PV3 constant The molar specific heat capacity of the gas will be R is universal gas constant OR...
- Q Section A Q 1 When white light enters a prism it gets split into its constituent colors This is due to a Different refractive index for different wavelength of each...
- Q The resistnace of a wire of length 2m and area of cross section 0 5 mm is 2 20 The specific resistance of the material of wire will be Question...
- Q An electron is moving with velocity v around a nucleus in eliptically orbit then moment of inertia of electron v respect to nucleus is 1 always zero 2 always constant...
- Q Zero Marks 0 In all other cases At t 0 a particle leaves the origin with a velocity of 6 m s in the positive y direction Its acceleration is...
- Q An electric bulb rated 100 W 100 V has to operated across 141 4 V 50 Hz A C supply Th capacitance of the capacitor which has to b connected...
- Q In a stationary wave all particles are 1 At rest at the same time twice in every period of oscillation 2 At rest at the same time only once in...
- Q Sound waves from a tuning fork F reach a point P by two separate routes FAP and FBP when FBP is greater th FAP by 12 cm there is silence...
- Q Two particles A and B of de Broglie wavelength AA and Ag are in motion in one dimension They combine to form a particle C This process conserves momentum The...
- Q During a 3 minus decay O An atomic electron is ejected O A neutron in the nucleus decays emitting an electron O A part of binding energy is converted into...
- Q are arra 32 The conducting shells A and B are shown below If charge on the shell B is q then electric flux linked with the spherical gaussian surface S...
- Q Minimum resonating length of a closed organ pipe is 50 cm when it is vibrated by same frequency then next resonating length will be 1 250 cm 2 200 cm...
- Q 5 At the centre of a fixed large circular coil of radius R a much smaller circular coil of radius r is placed The two coils are concentric and are...
- Q A train moving towards a tunnel in a huge mountain with a speed of 12 m s sounds its whistle If the driver hears 6 beats per second speed of...
- Q Necessary condicition for interference is that 1 The amplitudes of two waves may differ but the phase difference is constant 2 The amplitudes of two waves are same and the...
- Q When a bicycle is in motion and pedalled the force of friction is exerted by ground on two wheels is such that it acts In backward direction on rear wheel...
- Q Four charge of 1 C 1 C 1 C and 1 C are placed at the vertices of a square of side 2 cm in sequence Net force experienced by...
- Q In a transverse progressive wave of amplitude A the maximum particle velocity is four times its wave velocity The wavelength of the wave is 4AW BU K k 1 Aw...
- Q The property of a medium necessary for wave propagation is 1 Its inertia 2 Its elasticity Water wave are 3 Its low resistance Exegy waste il TO 4 All of...
- Q 1 f In case of a forced vibration the resonance wave becomes very sharp when the 1 applied periodic force is small 2 quality factor is small 3 damping force...
- Q An interference is observed due to two coherent sources A B separated by a distance 42 along the y axis where is the wavelength of the source A detector D...
- Q A graph is drawn between force acting and time for which it acts on particle The area under the curve between time interval t and to giv Momentum of particle...
- Q 32 7 A wave y 10 sin ax bt is reflected from a dence medium at an origin If 81 of energy is reflected then the equation of reflected wave...
- Q Q7 Two points A and B are on a disk that rotates about an axis Point A is three times as far from the axis as point B If the...
- Q 1 2 2 4 3 5 In periodic table if elements n 5 does not exits then total number of elements will be L 50 2 60 3 110 4...
- Q A car of mass 900 kg negotiates a banked curve of radius 90 m on a frictionless road If the banking angle is 45 the optimum speed of the car...
- Q Two metallic sphere rland r2 are touched and separated f ind the ratio of their self energy For this how are they ge tting U kq 2 2r by 2r...
- Q A conducting body has a cavity in it as shown in the diagram below A point charge is held at the centre of the cavity The electric flux linked with...
- Q Q 2 Two resistors are connected in series gives an equivalent resistance of 100 When connected in parallel gives 2 4 2 Then the individual resistance are a Each of...
- Q If in an excited state of hydrogen atom n 5 then value of n I m s will l be 1 5 4 4 12 2 f hydrogen atom 1...
- Q A point charge q is kept at the centre of the circle formed by cutting a spherical shell by a plane as shown The electric flux linked with the remaining...
- Q Asseertion Water waves in a river are not polarized Reason Water waves are longitudinal as well as transverse in nature 1 If both Assertion Reason are true the Reason is...
- Q 25m 46 Monochromatic radiation emitted when electron on hydrogen atom jumps from first excited to the ground state 51 irradiates a photosensitive material The stopping potential is measured to be...
- Q 3 v V 1 L L 2 n A whistle revolves in a circle with angular speed 20 rad sec using a string of length 50 cm If the frequency...
- Q 1 i ii and iii When a stretched wire and a tuning fork are sounded together 5 beats per second are produced when length of wire is 95 cm or...
- Q radiation of photon energy 1 Two 12 Three Accrding to Bohr s 3 Four 4 One AD When photons of energy hv fal on an aluminium plate of work function...
- Q 919 A copper wire is wound on a wooden frame whose shape is that of an equilateral triangle If the linear dimension a factor of 3 of each side of...
- Q 6 A cube of side a has a charge q at each of its vertices The net electric field intensity at its centre is r is the distance between a...
- Q A current of 10A is flowing east 1 poin to west in a long wire kept horizontally in the east west direction Find the magnetic field in the vertical plane...
- Q A balloon with mass 20 kg is moving downward with an acceleration 2 2 m s2 What mass Am of its contents be removed so that it starts moving up...
- Q Four charges of1 c 2 C 3 C and 6 C are placed one at each corner of the square of side 1m The square lies in the x y...
- Q 1 15 You are travelling in a car during a thunder storm in order to protect yourself from lightening would you prefer to 1 Remain in the car 2 Take...
- Q In the Davisson and Germer experiment the velocity of electrons emitted from the electron gun can be by AIPMT 2011 increasing the potential difference between the anode and filament 2...
- Q TV1 2 An electron of mass m with an initial velocity v viv 0 enters an electric field E Ei E constant 0 at t 0 If is its de...
- Q Relation between wavelength of photon and electron of same energy is 1 ph G 2 ph c 4 3 ph then value of n I m s will be ph...
- Q mc h The photoelectric threshold wavelength of silver is 3250 x 10 10 m The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536...
- Q A B Consider two very long straight insulated wires oriented at right angles The wires carry currents of equal magnitude in the directions shown in the figure above What is...
- Q The velocity time graph of a body travelling along a straight line is given below The distance travelled and displacement of the body are respectively Vimai A 6m 0 m...
- Q The wavelength involved in the spectrum of deuterium D are slightly different from that of hydrogen spectrum because 1 size of the two nuclei are different 2 nuclear forces are...
- Q D H 2V 2 3V 3 5V An electron in the hydrogen atom jumps from excited state n to the ground state The wavelength so emitted illumi nates a photosensitive...
- Q Light of wavelength 500 nm is incident on a metal with work function 2 28 eV The de Broglie wavelength of t emitted electron is NEET 201 1 2 8...
- Q 1 0 6 10 ms 2 61x10 ms 3 0 3x10 ms The de Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T kelvin...
- Q In the phenomenon of electric discharge through gases at low pressure the colored glow in the tube appears as a result of AIPMT 2008 1 excitation of electrons in the...
- Q When a metallic surface is illuminated with radiation of wavelength the stopping potential is V If the same surface is illuminated with radiation of wavelength 22 the stopping potential is...
- Q neutron 2 deutron 3 alpha 4 tritium The threshold frequency for a photosensitive metal is 7 x 1013 Hz If light of frequency 10 4 Hz is incident on metal...
- Q 11 1 2 A negative charge is placed at some point on the line joining the two Q charges at rest The direction of motics of negative charge will depend...
- Q A block of mass 1kg is placed over a plank of mass 2kg The length of the plank is 2m Coefficient of friction between the block and the plank is...
- Q Modern Phys A photon of wavelength less than threshold wavelength A is incident on a metal surface of work function W The de Broglie wavelength of the ejected electron of...
- Q H 30 6 eV 2 13 6 eV 3 13 6 eV 4 In Bohr series of lines of hydrogen spectrum the third line from the red end corresponds to...
- Q 1 5 x 1020 2 6 1018 3 62 x 10 0 4 An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level...
- Q For the circuit shown A C Current across AC is 0 98A Current across DB is 2 41A 1 2 602 2 1 C 71002 D 49V 202 B D...
- Q C 18 The potential on the 2 r r 3 r r 4 r r 1 1 1 C 19 64 charged drops coalesce to from a bigger charged drop...
- Q 1 2 1 2 3 2 3 4 2 In a sample of radioactive material what percentage of the initial number of active nuclei will during one mean life 1...
- Q 1 1 Which of the following wavelength is not possible for an X ray tube which is operated at 40 1 0 25 2 0 5 3 0 52 4...
- Q 3 If E 0 V cannot be zero The electric field in a region is directed outward and is proportional to the distance r from the origin Taking the electric...
- Q 3 3 3 A sphere of radius 1 cm has potential of 8000 V The energy density near the surface of sphere will be 2 8 x 10 J m...
- Q 4 kinetic energy of emitted photoelectrons decreases If wavelenth of photo is 6000 then its energy will be 3 2 66 eV 2 1 66 eV 1 0 66 eV...
- Q A positively charged ball hangs from a silk thread We put a positive test charge qo at a point and measure F qo then it can be predicted that the...
- Q 10 58 eV In photo emissive cell with exciting wavelength the fastest electron has speed v If the exciting wavelength changed to 32 4 the speed of the fastest emitted...
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