Physics question and answers for August 08, 2024
- Q The incident ray reflected ray and the outward drawn normal are denoted by the unit vectors a b and respectively Then choose the correct relation for these vectors mathange mothongo...
- Q i A particle is moving with uniform acceleration Its velocity after 48 is 17m s and 7s it is 26m s 1 Initial velocity 2 Velocity after 2s 3 Velocity...
- Q A point charge 2Q is placed just inside a cube corner on the body diagonal of the cube If electric flux passing through any of the 7Q KEO adjacent face...
- Q and diffraction 1 In interference distance between bright and dark is same but in diffraction width of central maxima is double of other maxima 2 Interference pattern is superposition of...
- Q The mass of a lift is 2000 kg When the tension in the supporting cable is 30000N then its acceleration is g 10m s 1 30 ms downwards 2 4...
- Q A small spherical ball is released in a viscous liquid whose density is half that of density of the ball After attaining terminal speed ratio of work done by viscous...
- Q 1 A rectangular rigid fixed block has a long horizontal edge A solid homogenous cylinder of radius R is placed horizontally at rest with its length parallel to the edge...
- Q Find the accelerations of rod A and wedge B in the arrangement shown in Fig 1 20 if the ratio of the mass of the wedge to that of the...
- Q xo A straight rod of mass m and length L is suspended from the identical springs as shown in figure The spring is stretched a distance due to the weight...
- Q 3 Two cylinders of same cross section and length L but made of two different materials of densities dy and d are cemented together to form a cylinder of length...
- Q 63 A fish is looking up through the water sees the outside world contained in a circular horizon If water 4 and the fish is 12cm below the 3 and...
- Q A To minimise the depression in a beam it is designed as T shape girder R The T shape girders have large load bearing surface which decreases the stress
- Q FL Fo 1 Fox Calculate the net work done by the force F whose variation with position has been shown as above 2 3 EIN EI Y X Xo x...
- Q 54 A man s near point is 0 5m and far point is 3m Power of spectacle lenses required for i reading purposes ii seeing distant objects respectively are 2...
- Q A body is made of two rods AB and CD rigidly joined together to form a T shape Two springs are attached to this body and the body is free...
- Q Two positive charges q are placed on x axis at a 0 and a 0 Variation of electric field along x axis is drawn in graphical form taking electric field...
- Q 12 For water at 0 C it takes one hour for first 3 mm of ice layer formation How much time will it take for next 6 mm of ice...
- Q D Rewrite the following sentences using tenses mentioned in the brackets 1 I have to complete the work on time simple past simple future FEER WEEK n Thre I had...
- Q A 10 kmph south B 10 2 kmph north east 10 2 kmph north D 10 kmph east C Paragraph for Questions 11 13 Consider the setup of block wedge...
- Q A ring of radius 5 m is lying in the x y plane and is carrying current of 1 A in anti clockwise sense If a uniform magnetic field B...
- Q A rigid ball of mass m strikes a rigid wall at 30 and gets reflected without loss of speed as shown in the figure The value of impulse imparted by...
- Q Won t there be potential difference due to 3V battery acr ss the capacitor 14 10V 24 zero 6 92 2 02 wwwwww 1092 3V 3 F HE Find the...
- Q Two wires of same material whose lengths in the ratio 1 2 and area of crossection the ratio 2 1 respectively are connected parallel across a potential difference The ratio...
- Q 78 A wire frame ABCD has a soap film The wire BC can slide on the frame without friction and it is in equilibrium in the position shown in the...
- Q h Cylindrical Gaussian surface is used to calculate electric field intensity for i Point charge ii Hollow sphere iii Infinitely plane Infinitely long uniform charged wire R S
- Q 0 Calculate the force of gravity between a 3 kg newborn baby and a 75 kg doctor standing 1 m away 1 3 5 x 10 7 N 2 6...
- Q A swimmer can swim in still water with speed v and the river is flowing with velocity v 2 To cross the river in shortest distance he should swim making...
- Q The electric field at a point inside a long cylinder charged throughout its volume is given by the relation E 3kr Where k is a positive constant and r is...
- Q 3 A sample of 0 1 g of water at 100 C and normal pressure 1 013 x 105 Nm 2 requires 54 cal of heat energy to convert to...
- Q Q 45 For a normal eye the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is...
- Q ged par voi towards a circular region of uniform magnetic field B perpendicular and into the plane of paper as shown in the figure C is the centre of the...
- Q 5 A radioactive isotope a has half life of 2 3 105 yrs The isotope decays into stable 3 A rock sample discovered by archaeologist contains a as 1 15...
- Q The mass of a cylindrical body depend on density d of material its diameter D and length L as M d DY LZ If maximum percentage error in measurement of...
- Q half of Initial intensity If a medium is placed between object and objective lens of microscope then resolving power of microscope will 1 Increase 2 Decrease 3 No change 4...
- Q 2 An equilateral prism of mass m resets on a rough horizontal surface with coefficient of friction A horizontal force F is applied on the prism as shown in the...
- Q A material when heated suddenly changes its magnetic property at a particular temperature and above this temperature its susceptibility is found to be inversely proportional to the absolute temperature The...
- Q 7 Four identical balls of mass m each are shown The three balls that lie on the ground are prevented from moving by applying horizontal forces not shown The reaction...
- Q 32 ALLE When the energy of the incident radiation is incredased by 20 the kinetic energy of the photoelectrons emitted from a metal surface increased from 0 5 eV to...
- Q 9 A block of mass 5 kg is placed over a rough horizontal surface with coefficient of friction 0 1 There is a horizontal force of 13 N is acting...
- Q Which of the following statements is false A C D The energy spectrum of a decay is line spectrum The energy spectrum of B particles is continuous The energy spectrum...
- Q A small sphere of mass m made of a material of density d falls from a height h on to the free surface of a liquid of density 3d in...
- Q Consider the charge configuration and a Gaussian surface as shown in figure If 1 2 and are net electric flux due to charges 91 92 and 93 respectively then Here...
- Q In same phase If AB is incident wavefront Then refracted 4 wavefront just after transmission is D 1 A B 2 A B Biconvex lens 3 A B 4 B...
- Q 2 Light waves a telescope must hav 4 All of the above ater waves For better resolution a 1 Large diameter objective 2 Small diameter objective 3 May be large...
- Q 3 A long cylindrical wire of radius a carries a current I distributed uniformly over its cross section If the magnetic field at distances r a and R a from...
- Q 2 A particle is traveling on the path r t with acceleration vector 6t et 0 Initially at t 0 the particle is at the origin with initial speed 4...
- Q If the kinetic energy of an electron gets tripled then the new de Broglie wavelength associated with it will be times of initial value 3 times of initial value times...
- Q A radioactive substance named sam decays at a rate of proportional to its size It has a half life of 13 years If there are initially 19 grams of sam...
- Q 2 A rod of uniform charge density and length Li placed vertically as shown A point charge Qo is placed at point O at a distance L from its one...
- Q 0 If the light from an ordinary source pass through a polaroid sheet then intensity of lig becomes 1 half 3 one fourth 2 remain same 4 Three fourth
- Q 1 When a force is applied on a wire of uniform cross sectional area 3 x 10 m and length 4 m the increase in length is 1 mm Energy...
- Q Rewrite the following sentences in negative and interrogative forms 1 Meena is washing clothes 5 The migratory birds are flying off 2 Rohan is playing a football match O Father...
- Q We have a galavanometer of resistance 252 It is shunted by a 2 50 wire The part of total current that flows through the galvanometer is given as A I...
- Q In a single slit diffraction experiment the wid of the slit is made double the original widt How does this affect the intensity of the centr diffraction band large 1...
- Q In double slit experiment if one slit is blocked 35 then what we get on screen 1 Uniform brightness on screen 2 Diffraction pattern on screen 3 Interference pattern remain...
- Q 44 unacThree black bodies 1 2 3 have radius r r r3 Emissive powers of black bodies at temperature T are E E E3 Then correct relation between them is...
- Q Two charged particles having charges luC and 1 C and of mass 50 g each are held at rest while their separation is 2m Now the charges are released Find...
- Q prediced In single slit diffraction if we use red light in place of blue light then 1 fringe pattern will spread 2 fringe pattern becomes narrow 3 No change 4...
- Q decreases A Spring balances show wrong readings after they have been used for a long time R Spring in spring balance temporary losses elasticity due to repeated alternating deforming
- Q The speed of electromagnetic wave in a medium of dielectric constant 2 25 and relative permeability 4 is approximately Only one correct answer A 1x 108 m s B 2...
- Q Four conducting plates of same area are placed close to each other Plate 1 2 and 3 are given charges Q 2Q and Q respectively while plate 4 is earthed...
- Q 32 2 What happens when two separate light sourc illuminate a wall 1 Uniform illumination 2 Interference fringes 3 Dark appear 4 Four times intensity of point
- Q A solid body floating in water has 1 of its volume immersed in it What fraction of its volume 5th
- Q of the body A Adiabatic elasticity of a gas is greater than isothermal elasticity Eadiabatic R
- Q Which among the following can emit radiation Excited electron in H atom Excited nucleus Excited electron in Li ion Both 1 and 3
- Q Two bodies A and B having masses m and 2m respectively are kept at a distance d apart A small particle is to be placed so that the net gravitational...
- Q The stopping potential is 4 Vwhen wavelength of incident monochromatic radiation is If wavelength of incident radiation is doubled on same photosensitive material the stopping potential becomes V The threshold...
- Q An ordinary light is pass from a polaroid 41 sheet P Then after P another polaroid sheet P is placed then Intensity of light after P will be 2 1...
- Q 2 Two charges q and 3q are placed fixed on x axis separated by distance d Where should a third charge 2q be placed from q so that it will...
- Q Two point charges are placed at the corners of a rectangle of sides 5 00 cm and 10 0 cm as shown below The charges are q 8 00 C...
- Q A wire of length is formed into a circular loop of one turn only and is suspended in a magnetic field B When a current I is passed through the...
- Q A block of mass M is connected to a spring of mass m and oscillates in simple harmonic motion on a horizon tal frictionless track The force constant of the...
- Q n cells each of emfE and internal resistance r send the same current through an external resistance R whether the cells are connected in series or in parallel Then A...
- Q Three concentric conducting shells A B and C of radius a 2a and 3a respectively are given charge Q 2Q and Q If potential of shell B 1 then value...
- Q Four point charges 20 20 Q and Q are fixed on the vertices of a square whose sides have length L as shown in figure The point O is the...
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