Physics question and answers for August 07, 2024
- Q Figure shows LCR series ac circuit If L is removed from the circuit current leads voltage by 45 while if C removed current lags the voltage by 45 Current passing...
- Q L A can of mass 1 kg is thrown upward which reaches a height of h 25 m from the throwing position Calculate the work done by the gravitational force...
- Q If all the particles are moving with same velocity then maximum de Broglie wavelength will be for Neutron O Proton hr min B particle
- Q A solenoid has 2000 turns wound over a length of 0 3 m Its cross sectional area is equal to 1 2x10 m Around its central cross section a coil...
- Q Copper The work function for sodium and copper are 2 eV and 4 eV respectively Which of them is suitable for a photo cell with 4000 light Sodium Mark for...
- Q errors percentage in the measurement of mass and speed are 2 and 3 respectively How much will be the maximum error in the estimation of kinetic energy obtained by measuring...
- Q Q4 of 90 Mark To reach your school at 10 30am let you start at 10 00am First you move 800m towards east then 600m towards north and finally 200m...
- Q The nucleus 64Cu half life 12 7h is known to decay by electron capture 61 contribution to total decay rate and B decay 39 contribution to total decay rate Partial...
- Q Assuming earth is a smooth sphere of radius Re and mass Me If a particle is thrown horizontally tangentially from earth with half of escape velocity then find out maximum...
- Q 1 A grenade of mass 5M initially at rest explodes into two pieces of mass 3M and 2M and the masses travel in opposite direction with velocity 2V and 3V...
- Q 9 Find the resultant of the following forces acting at point i 1 2 N along north east ii 9 8 2 N along north west iii 2 kg f...
- Q A concavo convex lens of radii of curvatures 20 cm 10 cm respectively silvered on one side as shown then which of the following option is incorrect X O 3...
- Q If the momentum of a proton is changed by an amount Po the corresponding change in the de Broglie wavelength is found to be 0 25 Then the original momentum...
- Q 35 In the given arrangement of an experiment of a meter bridge if AC corresponding to null deflection of galvanometer is x what would be its value if radius of...
- Q An object of mass 0 2kg executes simple harmonic motion along the x axis with a frequency of 25 Hz At the position x 0 04m the object has a...
- Q A body is projected from the ground for horizonta range 100 m At the highest point of its path breaks apart into two identical part P and Q If comes...
- Q Question Number 01 to 15 Only one option is correct A particle starts moving in a circular path of radius R with an initial angular speed rad s and angular...
- Q 0 A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm The outer sphere is earthed and the inner sphere is...
- Q A body is projected horizontally from the top of a tower with a velocity of 10 m s If it hits the ground at an angle 45 the vertical component...
- Q In the following circuit of PN junction diodes D D2 and D3 are ideal then I is E R B E 2R C 2E 3R D E R www R...
- Q A particle is moving along x axis and its velocity v Vs position x graph is a curve as shown in figure Line PQR is normal to curve at point...
- Q A spectral line 5000 in the line coming from a distant star is observed as 5010 The receding velocity of the star is O 1 2 x 107 cm s...
- Q 1 38 A particle moves from rest in a straight line with alternate acceleration and retardation of magnitudes a and a respectively during equal intervals of time t Find the...
- Q A point object O is kept in front of a plane mirror AB having length 10m The line AM makes an angle of 53 with mirror An observer initially at...
- Q 33 The density of water at 20 C is 998 kg m and at 40 C 992 kg m The coefficient of volume expansion of water is 1 10 4...
- Q 7 Monochromatic green light of wavelength 5 x 10 m illuminates a pair of slits 1 mm apart The separation between consecutive bright fringes on the interference pattern formed on...
- Q A vector A makes an angle 240 with the positive x axis its components along x axis and y axis are b a A and 3 c A 2 2...
- Q Consider two non conducting discs touching each other at point P as shown Their uniform surface charge densities and radius are shown in figure Potential at point P is equal...
- Q If the net external force acting on the system of particles is zero then which of the following may vary 1 Momentum of the system 2 Kinetic energy of the...
- Q 5 identical balls placed on smooth horizontal surface If 1st ball moving with velocity u 2 m horizontally collide with 2nd ball and 2nd ball collide with 3rd ball and...
- Q 4 86 A rocket ejects a steady jet whose velocity is equal to u relative to the rocket The gas discharge rate equals r kg s Determine the acceleration of...
- Q 43 Two ends of a spring are displaced along the length of the spring All displacements have equal magnitude In which case s the tension or compression in the spring...
- Q If in an interference pattern has maximum and minimum intensity is 36 1 ratio then the ratio of amplitudes is 3 4 07 4 O 4 7
- Q Q5 of 90 Mark for review To reach your school at 10 30am let you start at 10 00am First you move 800m towards east then 600m towards north and...
- Q Two concentric and R R respectively between R and R is thin metallic shells of radii R R bear charges Q and Q Then the potential at distance r D...
- Q If the length of second s hand in a clock is 4 cm the angular velocity and linear velocity of the tip is T 1 rad s 1 30 1...
- Q The angular width of central maxima in Fraunhoffer diffraction with the light of wavelength 6000 and slit width 12 x 10 5 cm is 2 rad 3 rad hr miny...
- Q A polaroid is placed in the path of an incoming unpolarised light of intensity lo The intensity of light passing through polaroid after polarisation would be lo 10 2 O...
- Q Ultraviolet radiation of 6 2 eV falls on an aluminium surface work function 4 2 eV The kinetic energy in joules of the fastest emitted electron is approximately O 3...
- Q A small spherical metal ball of radius r is lying at the bottom of a stationary container containing liquid of density p as shown in the figure Po is atmospheric...
- Q A bicromatic light consisting of wavelength 5000A and 6000A is used to obtain interferance pattern in youngs double slit experiment is 1mm and the distance between plane of slits and...
- Q Two coherent monochromatic light beams of intensities and 4 are superimposed The maximum and minimum possible intensities of the resulting beam are 51 1 51 3 91 1
- Q The dual nature of light is exhibited by O Photoelectric effect O Refraction and interference O Diffraction and reflection hr
- Q Two mirrors one concave and the other convex are placed 60 cm apart with their reflecting surfaces facing each other An object is placed 30 cm from the pole of...
- Q 1 An astronaut accidentally gets separated out of his small spaceship accelerating in interstellar space at a constant rate of 100 m s2 What is the acceleration of the astronaut...
- Q Consider a system of coplanar infinite straight wire and a rectangular loop of resistance 0 Q In as shown in the figure If current in the wire changes from i...
- Q Two short bar magnets of equal dipole moment M are Fastened perpendicularly at their centres The magnitude of two magnetic fields at a distance d from the centre on the...
- Q Some currency notes change their colour as you see them This is due to A Diffraction B C Polarization Interference
- Q A bod A of mass M while falling vertically downwards under gravity breaks into two parts a 3 body B of mass M and a body C of mass M...
- Q The angle of polarisation for a pair of medium is 60 then the critical angle is sin 3 tan 3 O cos 3 hr min sin 1
- Q body of mass 2 0 kg is at rest at height of 10 m above the ground Calcul LE after it has fallen through half the height tions 98 J...
- Q Young s double slit experiment is performed in air and then performed in water The fringe width Will remain same Will decrease Will increase hr miny Will be infinite
- Q A cubicla room is formed with 6 plane mirrors An insect moves along the diagonal of th floor with uniform speed The speed of its image in two adjacent walls...
- Q icate departure from the inverse square law Example 1 11 The electric field components in Fig 1 27 are E ax E E 0 in which a 800 N C...
- Q An electric lamp designed for operation on 10V AC is connected to a 220V AC supply through a choke coil of inductance 2H for proper operation The angular frequency of...
- Q a In the figure what value must R have if the current in the circuit is to be 1 2 mA Take 2 4 V 2 4 8 V and...
- Q Two lenses of achromatic doublet should have Equal lens powers Equal dispersive powers Equal ratio of lens powers and dispersive powers Equal magnitude of product of lens
- Q A circular coil has 10 turns with an effective radius of 0 5m and carries a current of 2 amp through it It is kept in a magnetic field perpendicular...
- Q Question 22 A The binding energy of deuteron H is 1 112 MeV per nucleon and an a particle He has a binding energy of 7 047 MeV per nucleon...
- Q sition X B A 30 60 D 60 4 Zero C The correct ascending order of magnitude impulse at points A B C D is 1 A B C D...
- Q A conducting loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides A magnetic induction R constant in...
- Q What should be the wavelength of the photon that enters when there is a quantum jump from level 1 to the last occupied level of a Neon atom A 0...
- Q X 0374 The diagrams represent the potential energy U as a function of the inter atomic distance r Which diagram corresponds to stable molecules found in nature L 1 r...
- Q A mass of 18 kg moving in a straight line is brought to rest in such a way that it lose kinetic energy at uniform rate of one joule per...
- Q Two particles of mass m and M are initially at rest at infinite distance Find their relative velocity of approach due to gravitational attraction when d is their separation at...
- Q The magnifying power of a compound microscope is high if x Both objective and eyepiece are of high focal length Objective has long focal length and eyepiece small Objective of...
- Q mA c 200 mA b 100 mA d 20 mA C B S E P M T 2011 A12 An AC voltage is applied to a resistance R and an...
- Q I I Column 1 System string 2k ing string Column 2 Extension in spring at equilibrium MAVEVA JATHE ii iii iv mg 4k mg k mg 2k Column 3 Maximum...
- Q 6 4kg 1 4 4 Consider three cases in equilibrium 60 60 Kg 4kg 60 Kg 4kg 111 60 K A man of mass 60 kg is holding the string...
- Q curves drawn between frictional 7 force f and applied force F for 2 bodies on ground Then correct statement is f 40 N A 20 N B F 1 0...
- Q Mark Tor Review 01 2 hr m In Davisson Germer experiment the maximum intensity is observed at Scattering angle 50 and 54 volt Scattering angle 54 and 50 volt Scattering...
- Q 49 In R L C series circuit the potential differences across each element is 20 V Now the value of the resistance alone is doubled then P D across R...
- Q 9 A p n photodiode is made of material with a band gap of 2 eV The minimum frequency of the radiation that can be absorbed by the material is...
- Q position x graph for a particle is shown below The particle is of mass 10 kg and is moving in the positive x direction 7 Its initial position is x...
- Q The kinetic energy of a 2 1 kg block moving across a horizontal frictionless surface increases linearly with time according to the following eq K t 4 t How far...
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