Physics question and answers for August 31, 2024
- Q Select false statement for standing transverse mechanical waves on a string A Total energy between two nodes remains constant fa aft find i B Total kinetic energy between two nodes...
- Q A black body is at room tempreture It is placed in a furnace and it is observed that 1 In begining it is seen most black and later on it...
- Q A long solenoid with 1000 turns per meter has a core with a relative permeability of 500 If the current in the windings is 2 A the values of Hand...
- Q NY75 C 2 3 33 C Two spheres of different materials one having radius double of other and wall thickness 1 4 of other are filled with ice If time...
- Q Which of the following is more close to a black body Black board paint 2 Green leaves 3 Black holes 4 Red roses A black body is at a temperature...
- Q d toy The power radiated by a black body is P and it radiates maximum energy at wavelength If the temperature of the black Zo body is now changed so...
- Q The intensity at the maximum in a YDSE is I Distance between two slits is d 52 where is the wavelength of light used in the experiment What will be...
- Q Consider two infinitely long wires parallel to the z axis carrying the same current I Y One wire passes through the point L with coordinates 1 1 and the other...
- Q Light of wavelength 500 nm travelling with a speed of 2 0 108 ms in a certain medium enters another medium of refractive index 5 4 times that of the...
- Q 3 It can t be resolved at any tin 4 In begining it is seen most black and later on it can t be resolved What is the mode of...
- Q A jet of water with cross section of 6 cm strikes a wa at an angle of 60 to the normal and rebounds elastically from the wall without losing energy...
- Q It is hotter at the same distance over the top of a fire than it is on the side of it mainly because 1 heat is rediated upwards 2 Air...
- Q There are 64 identical drops of a conducting fluid Each drop is charged to potential Vo They are combined to form a bigger drop Potential of bigger drop is nVo...
- Q 4 For a black body at temperature 727 C its radiating power is 60 watt and temperature of surrounding is 227 C If temperature of black body is changed to...
- Q 4 4 First increases becomes maximum and then Three identical charges are placed at the corners of an equilateral triangle If the force between an charges is F then the...
- Q Three metal rods made of copper aluminium and brass each 20 cm long and 4 cm in diameter are placed end to en with aluminium between the other two The...
- Q Black body spectrum is 1 Continuous spectrum with black lines 3 Continuous spectrum 4 None of the above 6 a despert 2 Continuous spectrum with black band
- Q Assuming the sun to have a spherical outer surface of radius r radiating like a black body at temperature t C the power received by a unit surface normal to...
- Q Internal energy of n moles of hydrogen at temperature T is equal to the internal energy of n2 moles of helium at temperature 2T The value of ratio is neglect...
- Q If Cp and Cy denoted the specific heat of unit gram mass of nitrogen at constant pressure and volume respectively then R is universal gas constant O Cp Cy R...
- Q 1 Q 4nR G 2 Q 4nR 0 1 2 3 4TR Q o 4 4 Q 4nR 0 A slab of stone of area 0 36 m and thickness...
- Q A cyclic process for one mole of an ideal gas is shown in the V T diagram The work done by the gas in AB BC and CA respectively are...
- Q Illustration 1 7 Show that the minimum size of a plane mirror required to see the full image of an observer is half the size of that observer Sol Let...
- Q 1 white 2 red 3 green The earth radiates in the infra red region of the specturm The spectrum is correctly given by XLRayleigh Jeans law 2 Planck s law...
- Q A disc of mass m and radius R rotates centre of mass with constant angular speed w Its centre of mass moves with a constant velocity v parallel to the...
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