Physics question and answers for July 28, 2024
- Q A time varying magnetic field B Kr t is existing in a cylindrical region of radius R as shown where k is a constant The induced electric field E at...
- Q A thin film of oil n 1 25 is located on a smooth wet pavement When viewed perpendicular to the pavement the film reflects most strongly red light at 640...
- Q Displacement of a truck moving along x axis is given by x at t 7 where tis time and a and 7 are positive constants Velocity of truck when its...
- Q A beam of light in air hits a stack of three slides with thicknesses of 2d d and d and refractive indexes of 2n n and n respectively at an...
- Q An object of height 5 cms is placed in front of a concave mirror of focal Length 15 cms at a distance of 10 cms Find the image distance image...
- Q A periodic voltage V varies with time t as shown in the figure T is the time period The r m s value of the voltage is V V T...
- Q 4 The potential energy u of a particle varies with A x X B distance x from a fixed origin as where A and B are constants The dimensions of...
- Q A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer If radar waves have a wavelength of 3 00 cm and...
- Q Monkey A 10 kg is climbing on a pole while B 5 Kg is holding on to the tail of monkey A If monkey A is climbing with acceleration 1...
- Q An oil film n 1 45 floating on water is illuminated by white light at normal incidence The film is 280 nm thick Find a the color of the light...
- Q Interference effects are produced at point P on a screen as a result of direct rays from a 500 nm source and reflected rays from the mirror as shown in...
- Q In a bicycle the radius of rear wheel is twice the radius of front wheel If rF and r are the radius VF and V are speeds of top most...
- Q Q31 In Young s double slit experiment distance between two sources is 0 1 mm The distance of screen from the sources is 20 cm Wavelength of light used is...
- Q Two glass plates 10 0 cm long are in contact at one end and separated at the other end by a thread 0 0500 mm in diameter Fig P37 39...
- Q A material having an index of refraction of 1 30 is used as an antireflective coating on a piece of glass n 1 50 What should be the minimum thickness...
- Q A body of mass M and moving with velocity u makes a head on elastic collision with another stationary body of m If A m M then the ratio f...
- Q A beam of 580 nm light passes through two closely spaced glass plates as shown in Figure P37 37 For what minimum nonzero value of the plate separation d is...
- Q Pure Si at 500 K has equal number of electron n and hole n concentrations of 1 5 10 6 m Doping by indium increases n to 4 5 10...
- Q The position vector of a particle R as a function of time is given by 7 R 4 sin 2nt 4 cos 2nt j where R is in metre t...
- Q 1 04 A ship A is moving Westwards with a speed of 10 km h and a ship B 100 km South of A is moving Northwards with a speed...
- Q Two narrow parallel slits separated by 0 850 mm are illumi nated by 600 nm light and the viewing screen is 2 80 m away from the slits a What...
- Q When a liquid is introduced into the air space between the lens and the plate in a Newton s rings apparatus the diameter of the tenth ring changes from 1...
- Q A wave function expressing the displacement a as a function of position and time t is given as Pe QB Rt which of the following expression has dimension different from...
- Q A rigid body is rolling without slipping on the horizontal surface A 2 3 60 A 00 Column I Velocity at point A i e VA 1 Velocity at point...
- Q Find the work done when a 25 kg weight is i lifted to JUE a vertical height of 2 0 m from the ground ii carried ELE TH to the...
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