[{"id":111253,"question":"When a platinum wire is heated, it appears white at","choices":[{"text":"1600<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"900<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"1100<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"1300<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111252,"question":"When platinum wire is heated, it appears cherry red at","choices":[{"text":"1600<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"900<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"1100<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"1300<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111251,"question":"When a platinum wire is heated, it appears yellow at","choices":[{"text":"1600°C","value":"A"},{"text":"900°C","value":"B"},{"text":"1100°C","value":"C"},{"text":"1300°C","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":111250,"question":"When a platinum wire is heated, it appears orange red at","choices":[{"text":"500<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"A"},{"text":"900<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"B"},{"text":"1100<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"C"},{"text":"1300<span style=\"color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;\">°C</span>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111249,"question":"When a platinum wire is heated, it appears dull red at about","choices":[{"text":"500°C","value":"A"},{"text":"900°C","value":"B"},{"text":"1100°C","value":"C"},{"text":"1300°C","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111248,"question":"A high temperature, the proportion of shorter wavelengths radiation, emitted by the body","choices":[{"text":"decreases","value":"A"},{"text":"first increases then decreases","value":"B"},{"text":"increases","value":"C"},{"text":"any one of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111247,"question":"At the temperature, a body emits radiation which is principally","choices":[{"text":"of long wavelengths in the visible region","value":"A"},{"text":"of long wavelengths in the invisible infrared region","value":"B"},{"text":"of short wavelength in invisible ultraviolet region","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111246,"question":"According to the special theory of relativity, a moving clock","choices":[{"text":"runs faster","value":"A"},{"text":"runs slower","value":"B"},{"text":"neither runs faster nor slower","value":"C"},{"text":"all of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111245,"question":"Newton's law of motion do not hold in","choices":[{"text":"an accelerated frame of reference","value":"A"},{"text":"an unaccelerated frame of reference","value":"B"},{"text":"both of these","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111244,"question":"The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of","choices":[{"text":"2 cm/s","value":"A"},{"text":"20 cm/s","value":"B"},{"text":"200 cm/s","value":"C"},{"text":"2000 cm/s","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":111243,"question":"According to the special theory of relativity","choices":[{"text":"mass and energy are same entities","value":"A"},{"text":"mass and energy are same entities but interconverible","value":"B"},{"text":"mass and energy are different entities but interconverible","value":"C"},{"text":"mass and energy are different entities but non-interconveritble","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111242,"question":"The mass of an object will be doubled at speed","choices":[{"text":"1.6 x 10<sup>8</sup>ms<sup>-1</sup>","value":"A"},{"text":"2.6 X 10<sup>8</sup>ms<sup>-1</sup>","value":"B"},{"text":"2.6 x 10<sup>7</sup>ms<sup>-1</sup>","value":"C"},{"text":"2.6 x 10<sup>9</sup>ms<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111241,"question":"The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes","choices":[{"text":"2 mo","value":"A"},{"text":"1.67 mo","value":"B"},{"text":"0.67 mo","value":"C"},{"text":"2.67 mo","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":111240,"question":"The Einstein's changes in length, mass and time are not observed in common life because","choices":[{"text":"We dont observer then seriously","value":"A"},{"text":"The masses are too large","value":"B"},{"text":"Their speed is too small than the speed of right","value":"C"},{"text":"All of the above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":111239,"question":"If a body reaches a speed equal to the speed of light, then its mass will became","choices":[{"text":"zero","value":"A"},{"text":"very small","value":"B"},{"text":"infinity","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":3}]