Physics question and answers for August 09, 2024
- Q Young s double slit experiment is performed in air an then performed in water The fringe width O will remain same O Will decrease O Will increase O Will be...
- Q There exists a uniform magnetic field perpendicular to the plane of the figure in a cylindrical region of radius a the magnetic field is increasing at a constant rate of...
- Q Candle C Lens L Screen S 1 the screen in the direction of the lens or the lens in the direction of the screen 2 the screen in the direction...
- Q Two coherent monochromatic point sources S and S of wavelength 600 nm are placed symmetrically on either side of the centre of the circle as sown The sources are separated...
- Q 5 A uniformly charged solid sphere of radius R has potential Vo measured with respect to on its Vo surface For this sphere the equipotential surfaces with potentials 3V 5V...
- Q What is expected when 20 kn 1 W resistor in parallel are used instead of 1 10K 1 W O a Provides less power O b Provides higher current O...
- Q In ultrasonic interferometer the distance between two positions of reflector at which maximum current is found is 2 5 mm The velocity of the sound sound in air is 440...
- Q Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point 1 covalent...
- Q A battery of emf 10 V and internal resistance of 30 is connected to a resistor The current in circuit is 0 5 A What is terminal voltage of battery...
- Q 5 Two men can swim in still water at the rate of 5 km h One swims upstream a distance equal to the width of the river half km and...
- Q A charge Q is placed at origin The electric potential due to this charge at a pointi space is V The work required by external agent force to bring a...
- Q 7 A square loop of side 5 cm enters a magnetic field with 1 cms The front edge enters the magnetic field at t 0 then which graph best depicts...
- Q a starts 24 A particle of specific charge charge mass moving from the origin under the action of an electric field E Eoi and magnetic field B Bok Its velocity...
- Q On increasing the plate separation of a charged capacitor with insulated hand with battery still connected the stored energy O Increases O Decreases Remains constant Becomes zero
- Q A 31 0 cm diameter hollow sphere is suspended by a wire The system requires a torque of 0 264 N m to twist the wire and rotate the sphere...
- Q A particle having charge q and mass m is projected with velocity 2 3 in unifor electric field E Ej change in momentum of particle during a time interval At...
- Q A particle is moving along straight line whose position x at time t is described by x t t where x is meters and t is in seconds Then the...
- Q A certain resistance was measured to be 30 2 at 20 C and 40 Q at 5 C Find the temperature coefficient at 0 C and 25 C and the...
- Q 6 9Q An electric dipole is placed at origin with its dipole moment directed along negative x axis The direction of electric field at point 1 2 0 is 1...
- Q A hollow metallic cube has edge length 12 cm A liquid whose coefficient of volume expansion is 6 x 10 10 C 1 is poured into it upto height 3cm...
- Q 13 A silicon p n junction diode has the following parameters N 2 10 8 cm x N 2 10 6 cm T tp 2 x 10 6 s D...
- Q Two spherical conductors of radii 4 cm and 5 cm are charged to same potential I 0 and 0 be respective charge densities of charges on both conductors then ratic...
- Q y x515x y x as shown in the figure 20 ded by the curve and line 20 iii Find the volume solid obtained by rotating the region bounded by the...
- Q A wire of resistance 9 ohm is broken into two parts The ratio of cut length 1 These two pieces are connected in parallel The net resistance will be 020...
- Q A screening test for cancer has a low false positive rate and a low false negative rate in that with careful use one finds the disease in 95 of the...
- Q View In English A ball after falling from a height of 10 m strikes the roof of a lift which is descending down with a velocity of 1 m s...
- Q 17 A mass of 5 kg is suspended by a string 10 m long A horizontal force is applied on the mass to pull it 5 m from a vertical...
- Q Three balls are thrown from the top of a building with equal speeds at different angles When the balls strike the ground their speeds are V1 V2 and v3 respectively...
- Q Centripetal force 1 can change speed of the body 3 is constant for uniform circular motion 2 is always perpendicular to direction of motion 4 all of these
- Q pressibility of liquid Two soap bubbles are connected by a tube as shown in figure What happens when stopper S is removed liquid lead 1 Size of bubble A increases...
- Q In a potentiometer arrangement a cell of emf 1 25 volt gives a balance point at cm of length of wire If cell is replaced by another cell the balance...
- Q If E represents the electric field at point A and V represents the potential at point A due to a small dipole p as shown in the diagram then which...
- Q A wheel of radius R rolls on the ground with a uniform velocity v The relative acceleration of topmost point of the wheel with respect to the bottommost point is...
- Q Like an atom when a nucleus is in excited state spontaneously decays to its ground state and a photon is emitted with energy of order of eV keV meV
- Q Match the columns I and II Column 1 A Angle B Power C Work D Energy Length 4 MLT 2 a A 3 B 4 C 1 D 3 b...
- Q Direction Analyze the problem and answer the given questions Performance task Height in meters Horizontal distance in meters A bail on the football field was kicked by Bruno The parabolic...
- Q A resistor of resistance R is connected to an ideal battery If the value of R is decreased the power dissipated in resistor will Increase Decrease O No change Battery...
- Q 24 ner Two blocks of equal masses have been placed on two faces of a fixed wedge as shown in figure The lliw ditog bealm S to brege instappe niliw...
- Q 3 At what height from the surface of earth the gravitation potential and the value of g are 5 4 x 107 J kg and 6 0 m s 2...
- Q Two wires of equal radii with resistivities p and p2 and length 1 and 2 respective are joined in series the equivalent resistivity of combination is P P 6 6...
- Q A boy in an elevator with open roof shoots a bullet in vertically upward direction from a height of 1 5 m above the floor of the elevator The initial...
- Q 20 Three stones are projected simultaneously with same speed v from top of a tower Stone 1 is projected horizontally other two makes an angle with horizontal as shown in...
- Q Q 14 In the network shown below if 50 resistor is short circuited then value of Requals to Rea 60 ww ww 69 a 15 22 c 12 02 49...
- Q View In English If the first minima in a young s slit experiment occurs directly in front of one of the slits then the wavelength of the radiation used is...
- Q View In English In the circuit shown in figure K is open The charge on capacitor C in steady state is q Now key is closed and at steady state...
- Q The potential at a point due to an electric dipole will be maximum and minimu when angles between axis of dipole and line joining the point to dipole are respectively...
- Q Nuclei of radioactive element A are produced at rate 2 where t is time at any time t The element A has decay constant A Let N be the number...
- Q Two positive charges are kept at a 0 and a 0 A negative charge then let from a position 0 y y al The negative charge will perform O Oscillatory...
- Q A wire is connected in left gap of a meter bridge balance a 100 resistor in the right gap to a point which divides the bridge wire in the ratio...
- Q A boy of weight 60 kg wt is standing in a lift If the lift beings to move up with a uniform speed 4 9m s the apparent weight of...
- Q A mass of 5 kg is suspended by a string 10 m long A horizontal force is applied on the mass to pull it 5 m from a vertical line...
- Q A force of 5N acts on a body at rest and mass 1kg During this time the body attains a velocity of 30m s The time for which the force...
- Q 1 The condition for obtaining secondary maximum in the diffraction pattern due to single slit is a is width of the slit n is order of maxima is wavelength of...
- Q A body of mass m placed on an inclined plane of inclination 30 with the horizontal as shown Then the acceleration of the block is g 30 m smooth fixed...
- Q A wheel is rotating at 720 rpm and the power supply is swtiched off the retardation is produce is 2 radian sec 2 How much time will it take to...
- Q two concentric sphere radii r1 and r2 the charge on inner sphere and outer sphere are 2micro columb and 4 micro c olumb if two sphere are connected by wires...
- Q The Ka wavelength of an element with atomic number z is X The ka wavelength of an element with atomic number 2z is A2z How are Az and A2z related...
- Q S The ratio of energy required to raise a satellite to a height h above the earth surface to that required to put it into the orbit is a h...
- Q A bar magnet of length 3 cm has points A and B along its axis at distances of 24 cm and 48 cm on the opposite sides Ratio of magnetic...
- Q If the dimensions of a physical quantity are given by M Lb Ts then the physical quantity will be a velocity if a 1 b 0 c 1 b acceleration...
- Q V 3g 8 Let E be the energy required to raise a satellite to height h above earth s surface and E be the energy required to put the same...
- Q 13 A block of wood floats in water with t th of its volume submerged but it just floats in another liquid The density of liquid is in kg m...
- Q 56 The average electric field of electromagnetic waves in certain region of free space is 9 x 104 N C Then average magnetic field in same region is 1 27...
- Q A radioactive isotopes is being produced at a constant rate X Half life of substance is Y After some time the no of radioactive nuclei become constant The value of...
- Q 33 What will be the work done in increasing the radius of soap bubble from solution is T 1 3nr T 3 9 r T 2 4 30m T 12...
- Q ROSI V00V tent de stingr AXE P etallic shell of mass M and radius R filled with water of mass M is set into pure rolling motion on a smooth...
- Q The space between two large plane surfaces is 2 5 cm and it is filled with glycerine What force is required to drag a very thin plate 1m in area...
- Q 1 The angular position of a particle revolving about an axis is given by 0 t t 3t 4 radian Find the acceleration of the particle at time t 2s...
- Q A parallel plate capacitor having capacitance Co is connected to a battery of emf E It is then disconnected from the battery and a dielectric slab of dielectric constant k...
- Q A cylinder of radius R 20 cm is moving between two planks as shown in figure There is no slipping at any point The angular speed of cylinde is 10...
- Q and B are placed in front of slits A and B respectively If pAtA BtB then the centra maxima may ONO not shift shift towards A if t tB
- Q The energy of a tungsten atom with a vacancy in L small is 11 3KaV Wavelength of K photon for tungsten is 21 3pm If a potential difference of 62kV...
- Q 3 May be zero 4 All of these Figure shows two containers P and Q with same base area A and each filled upto same height with same liquid Select...
- Q A conducting wire is bend into a loop as shown in the figure The segment AOB is parabolic given by t equation y 2x while segment BA is a straight...
- Q The figure shows a Young s double slit experimental setup It is observed that when a thin transparent sheet of thickness t and refractive index u is put in front...
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