[{"id":158805,"question":"If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:","choices":[{"text":"Newton","value":"A"},{"text":"Joule","value":"B"},{"text":"Joule-Sec","value":"C"},{"text":"Joule-s<sup>-1</sup>","value":"D"},{"text":"Watt","value":"E"}],"correctAnswer":2},{"id":158804,"question":"Max Planck received the Nobel Prize for his discovery of energy quants in:","choices":[{"text":"1718 AD","value":"A"},{"text":"1918 AH","value":"B"},{"text":"1818 AD","value":"C"},{"text":"1918 AD","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":158803,"question":"The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:","choices":[{"text":"Wien's constant","value":"A"},{"text":"Stefen's constnat","value":"B"},{"text":"Planck's constant","value":"C"},{"text":"Boltzmann's constant","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":158802,"question":"Wien's constant is measured in:","choices":[{"text":"Metre per kelviin","value":"A"},{"text":"Metre kelvin","value":"B"},{"text":"Kelvin per meter","value":"C"},{"text":"Joules","value":"D"},{"text":"Dynes","value":"E"}],"correctAnswer":2},{"id":158801,"question":"The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:","choices":[{"text":"Lummer","value":"A"},{"text":"Planck","value":"B"},{"text":"Pringsheim","value":"C"},{"text":"Both (A ) and (B)","value":"D"},{"text":"Both (A) and (C)","value":"E"}],"correctAnswer":5},{"id":158800,"question":"When platinum wire is heated, then at the temperature of 500 <sup>o</sup>C, it becomes:","choices":[{"text":"Yellow","value":"A"},{"text":"Orange red","value":"B"},{"text":"Dull red","value":"C"},{"text":"White","value":"D"},{"text":"Cherry red","value":"E"}],"correctAnswer":3},{"id":158799,"question":"The nature of radiations emitted by a hot body depends upon its:","choices":[{"text":"Metarial","value":"A"},{"text":"Temperature","value":"B"},{"text":"colour","value":"C"},{"text":"Volume","value":"D"},{"text":"Length","value":"E"}],"correctAnswer":2},{"id":158798,"question":"When the atomic particle are moving with velocities approaching that of light:","choices":[{"text":"Newton's laws become valid","value":"A"},{"text":"Relativistic effects become prominent","value":"B"},{"text":"Botha(A) and (B) are valid","value":"C"},{"text":"Neither (A)nor (B)","value":"D"},{"text":"There mass becomes zero.","value":"E"}],"correctAnswer":2},{"id":158795,"question":"As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:","choices":[{"text":"Smaller","value":"A"},{"text":"Lerger","value":"B"},{"text":"Same","value":"C"},{"text":"Much larger","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":1},{"id":158793,"question":"the dilation of time applies to the timing processes which are:","choices":[{"text":"Physical","value":"A"},{"text":"Chemical","value":"B"},{"text":"Biological","value":"C"},{"text":"All of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":158791,"question":"Due to relative motion of observer and the frame of reference of events, time always:","choices":[{"text":"Dilates itself","value":"A"},{"text":"Contracts itself","value":"B"},{"text":"Stretches itself","value":"C"},{"text":"Both (A) and (C)","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":158789,"question":"Practically the quantity v/c is always:","choices":[{"text":"less than one","value":"A"},{"text":"Equal to one","value":"B"},{"text":"Greater then one","value":"C"},{"text":"all of these","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":1},{"id":158787,"question":"the symbol to be used in relativity problems denotes:","choices":[{"text":"Dilated time","value":"A"},{"text":"Proper time","value":"B"},{"text":"Life time","value":"C"},{"text":"Half time","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":158785,"question":"There is no way to detect:","choices":[{"text":"Absolute uniform motion","value":"A"},{"text":"Accelerated motion","value":"B"},{"text":"State rest","value":"C"},{"text":"State of motion","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":1},{"id":158783,"question":"The special theory of relativity is based on:","choices":[{"text":"Four postulates","value":"A"},{"text":"Three postulates","value":"B"},{"text":"Two postulates","value":"C"},{"text":"One postulate","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3}]