[{"id":119985,"question":"When low energy photon interact with a metal,which of the following effect is likely to be taken place","choices":[{"text":"pair production","value":"A"},{"text":"photoelectric","value":"B"},{"text":"Compton effect","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119984,"question":"Compton was awarded Nobel prize in physics in","choices":[{"text":"1921","value":"A"},{"text":"1923","value":"B"},{"text":"1925","value":"C"},{"text":"1927","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119983,"question":"In the compton's effect, it is found that the wavelength of incident x-rays is","choices":[{"text":"greater than the wavelength of scattered x-rays","value":"A"},{"text":"equal to the wavelength of scattered x-rays","value":"B"},{"text":"less than the wavelength of scattered x-rays","value":"C"},{"text":"any one of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119547,"question":"Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in","choices":[{"text":"1916","value":"A"},{"text":"1919","value":"B"},{"text":"1921","value":"C"},{"text":"1923","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111279,"question":"According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the","choices":[{"text":"number of photoelectrons","value":"A"},{"text":"size of the photoelectrons","value":"B"},{"text":"charge on photoelectrons","value":"C"},{"text":"K.E of photoelectrons","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":111278,"question":"As the light shines on the metal surface, the electrons are ejected","choices":[{"text":"slowly","value":"A"},{"text":"instantaneously","value":"B"},{"text":"either of these","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111277,"question":"The value of threshold frequency for different metals is","choices":[{"text":"different","value":"A"},{"text":"same","value":"B"},{"text":"may be different or may be same","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111276,"question":"There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as","choices":[{"text":"maximum frequency","value":"A"},{"text":"minimum frequency","value":"B"},{"text":"threshold frequency","value":"C"},{"text":"all of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111275,"question":"The photoelectric effect, the maximum energy of photoelectrons depends on the","choices":[{"text":"particular metal surface","value":"A"},{"text":"frequency of incident light","value":"B"},{"text":"both of them","value":"C"},{"text":"none of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111274,"question":"When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called","choices":[{"text":"thermoionic electrons","value":"A"},{"text":"free electrons","value":"B"},{"text":"photoelectrons","value":"C"},{"text":"slow electrons","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111273,"question":"The emission of electrons from a metal surface when exposed to light of suitable frequency is called the","choices":[{"text":"pair production","value":"A"},{"text":"Compton effect","value":"B"},{"text":"photoelectric effect","value":"C"},{"text":"relativity","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111272,"question":"Electromagnetic radiation or photons interact with matter in","choices":[{"text":"two distinct ways","value":"A"},{"text":"three distinct ways","value":"B"},{"text":"four distinct ways","value":"C"},{"text":"five distinct ways","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111271,"question":"The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by","choices":[{"text":"Max plank","value":"A"},{"text":"Newton","value":"B"},{"text":"Einstein","value":"C"},{"text":"J.J. Thomson","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111270,"question":"The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as","choices":[{"text":"classical mechanics","value":"A"},{"text":"Newtonian mechanics","value":"B"},{"text":"quantum mechanics","value":"C"},{"text":"statistical mechanics","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111269,"question":"The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is","choices":[{"text":"100 ev","value":"A"},{"text":"10<sup>6</sup>e v","value":"B"},{"text":"10<sup>3</sup>e v","value":"C"},{"text":"1.0 e v","value":"D"},{"value":"E"}],"correctAnswer":4}]