[{"id":158913,"question":"The figure 1.007276μ shows the mass of an:","choices":[{"text":"Atom","value":"A"},{"text":"Positron","value":"B"},{"text":"Electron","value":"C"},{"text":"Neutron","value":"D"},{"text":"Proton","value":"E"}],"correctAnswer":5},{"id":158912,"question":"Nucleon means:","choices":[{"text":"Only electrons","value":"A"},{"text":"Only neutrons","value":"B"},{"text":"Only protons","value":"C"},{"text":"Both (A ) and (C)","value":"D"},{"text":"Both (B) and (C)","value":"E"}],"correctAnswer":5},{"id":158911,"question":"Neutron was disvovered by:","choices":[{"text":"Rutherford in 1920","value":"A"},{"text":"Chadwick in 1922","value":"B"},{"text":"Bohr in 1913","value":"C"},{"text":"Compton in 1927","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":2},{"id":158910,"question":"Neutron was suggested to be in the nucleus by:","choices":[{"text":"Rutherford in 1920","value":"A"},{"text":"Bohar in 1913","value":"B"},{"text":"Dirac in 1928","value":"C"},{"text":"Anderson in 1932","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":1},{"id":120075,"question":"Which of these is not a radiation detector","choices":[{"text":"Wilson cloud chamber","value":"A"},{"text":"cyclotron acceleration","value":"B"},{"text":"Geiger Miller counter","value":"C"},{"text":"solid state detector","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120074,"question":"When a charged particle passes through matter, it produces ionization, this effect is used in","choices":[{"text":"fission reaction","value":"A"},{"text":"reactor","value":"B"},{"text":"radiation detector","value":"C"},{"text":"fusion reaction","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":120073,"question":"Radiation detector are used to","choices":[{"text":"measure intensity of radiation","value":"A"},{"text":"measure energy of radiation","value":"B"},{"text":"difference between different types of radiation","value":"C"},{"text":"all the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":120072,"question":"Pair production take place when energy of<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">γ-rays photon is</span>","choices":[{"text":"equal to 1.02 Mev-","value":"A"},{"text":"greater than 1.02 Mev","value":"B"},{"text":"less than 1.02 Mev","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120071,"question":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">γ-rays behave like a particle because they explain the</span>","choices":[{"text":"Compton effect","value":"A"},{"text":"Photoelectric effect","value":"B"},{"text":"Pair-production","value":"C"},{"text":"all the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":120070,"question":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">γ-rays are</span>","choices":[{"text":"electrostatic waves","value":"A"},{"text":"electromagnetic waves","value":"B"},{"text":"heavy particles","value":"C"},{"text":"longitudinal waves","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120069,"question":"The penetration power of<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">β-particle is</span>","choices":[{"text":"zero","value":"A"},{"text":"less than<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">α-particle</span>","value":"B"},{"text":"equal to<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">α-particle</span>","value":"C"},{"text":"greater than<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">α-particle</span>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":120068,"question":"The range of<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">β-particle in air is greater than that of</span><span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">α-particle by</span>","choices":[{"text":"1000 times","value":"A"},{"text":"100 times","value":"B"},{"text":"15 times","value":"C"},{"text":"10 times","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120067,"question":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">β-particles are easily deflected by collisions than heavy</span>","choices":[{"text":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">α-particles</span>","value":"A"},{"text":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">β-particles</span>","value":"B"},{"text":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">γ-particles</span>","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":120064,"question":"How much time, the<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">α-particle more massive than an electron</span>","choices":[{"text":"600","value":"A"},{"text":"7000","value":"B"},{"text":"5000","value":"C"},{"text":"15000","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120063,"question":"The range of particle depends upon the factor","choices":[{"text":"charge, mass and energy of particle","value":"A"},{"text":"density of medium","value":"B"},{"text":"ionization potential of the atoms","value":"C"},{"text":"all the above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":120062,"question":"The distance travelled by<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">α-particle in a medium before coming to rest, is called</span>","choices":[{"text":"range of<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: small;\">γ-particle</span>","value":"A"},{"text":"range of neutrons","value":"B"},{"text":"range of particle","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":120061,"question":"Which of the following material has smaller has life","choices":[{"text":"uranium","value":"A"},{"text":"polonium","value":"B"},{"text":"radium","value":"C"},{"text":"radian","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":120060,"question":"Which of the following material has longer half life","choices":[{"text":"radium","value":"A"},{"text":"polonium","value":"B"},{"text":"radium","value":"C"},{"text":"uranium","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":120058,"question":"The half life of uranium-238 is","choices":[{"text":"6.2 x 10<sup>9</sup>years","value":"A"},{"text":"4.5 x 10<sup>9</sup>days","value":"B"},{"text":"4.5 x 10<sup>9</sup>years","value":"C"},{"text":"1.3 x 10<sup>6</sup>years","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":120057,"question":"The half lie of radium-226 is","choices":[{"text":"238 years","value":"A"},{"text":"4.5 x 10<sup>9</sup>days","value":"B"},{"text":"1620 years","value":"C"},{"text":"332 years","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":120056,"question":"The unit of decay constant is","choices":[{"text":"sex","value":"A"},{"text":"sec<sup>2</sup>","value":"B"},{"text":"sec<sup>-1</sup>","value":"C"},{"text":"sec<sup>-2</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":120055,"question":"Fraction of the decaying atoms per unit time is called","choices":[{"text":"decay atom","value":"A"},{"text":"decay element","value":"B"},{"text":"decay constant","value":"C"},{"text":"decay","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120053,"question":"In radioactive decay, the new element which is formed due to the disintegration of original element is called","choices":[{"text":"element","value":"A"},{"text":"daughter element","value":"B"},{"text":"parent element","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120052,"question":"In radio-active decay, the original element which disintegrate to another element is called","choices":[{"text":"element","value":"A"},{"text":"daughter element","value":"B"},{"text":"parent element","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120051,"question":"The emission of radiations take place in elements, having charge number greater than","choices":[{"text":"109","value":"A"},{"text":"82","value":"B"},{"text":"69","value":"C"},{"text":"52","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120048,"question":"The time required for a radioactive material to decrease in active by one half is called","choices":[{"text":"half time","value":"A"},{"text":"half life","value":"B"},{"text":"disintegration time","value":"C"},{"text":"mean life","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120047,"question":"The half life of radioactive substances depends upon","choices":[{"text":"amount of substance","value":"A"},{"text":"energy of substance","value":"B"},{"text":"state of substance","value":"C"},{"text":"temperature of substance","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":120044,"question":"Different radioactive material have","choices":[{"text":"same half lives","value":"A"},{"text":"different half lives","value":"B"},{"text":"same mean lives","value":"C"},{"text":"same total lives","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":120043,"question":"The rate of decay of a radioactive substance","choices":[{"text":"decrease exponentially with time","value":"A"},{"text":"decreases linearly with time","value":"B"},{"text":"increases linearly with time","value":"C"},{"text":"increases exponentially with time","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":120042,"question":"After alpha decay the atomic number of the atom","choices":[{"text":"increase by four","value":"A"},{"text":"decreases by two","value":"B"},{"text":"increases by two","value":"C"},{"text":"decrease by four","value":"D"},{"value":"E"}],"correctAnswer":3}]