[{"id":161570,"question":"When a falling body hits ground, its KE changes to _____ energy.","choices":[{"text":"Potential","value":"A"},{"text":"Chemical","value":"B"},{"text":"Mechanical","value":"C"},{"text":"sound and heat","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":161569,"question":"The commercial unit of electrical energy is :","choices":[{"text":"K Watt","value":"A"},{"text":"KWH","value":"B"},{"text":"Horse power","value":"C"},{"text":"Joule","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":161568,"question":"The types of mechanical energy is/are:","choices":[{"text":"Kinetic energy","value":"A"},{"text":"Potential energy","value":"B"},{"text":"Both of these","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":161567,"question":"Escape velocity from surface of Moon as compared to that from Earth surface is:","choices":[{"text":"Greater","value":"A"},{"text":"Smaller","value":"B"},{"text":"Equal","value":"C"},{"text":"None of thes","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":161566,"question":"When two protons are brought are brought closer potential energy of both of them:","choices":[{"text":"Increases","value":"A"},{"text":"Decreases","value":"B"},{"text":"Remains same","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":161565,"question":"The energy stored int he water of the dam is:","choices":[{"text":"Electric energy","value":"A"},{"text":"Kinetic energy","value":"B"},{"text":"Potential energy","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":161564,"question":"Work-energy principle states that work done on the body by applied force is equal to change in:","choices":[{"text":"Potential energy","value":"A"},{"text":"Kinetic nergy","value":"B"},{"text":"Linear momentum","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":161563,"question":"When velocity of moving body is doubled, the quantity which is also doubled is its:","choices":[{"text":"K.E.","value":"A"},{"text":"Acceleration","value":"B"},{"text":"Momentum","value":"C"},{"text":"P.E.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":161562,"question":"Energy stored in the spring of a watch is called","choices":[{"text":"Potential energy","value":"A"},{"text":"Kinetic energy","value":"B"},{"text":"Nuclear energy","value":"C"},{"text":"Elastic potential","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":155223,"question":"Work is product of:","choices":[{"text":"Force and velocity","value":"A"},{"text":"Heat and energy","value":"B"},{"text":"Force and displacement","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":155220,"question":"A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60<span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">° with the horizontal. The work done by the boy is:</span>","choices":[{"text":"1.25 J","value":"A"},{"text":"12.5 J","value":"B"},{"text":"125 J","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155217,"question":"If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:","choices":[{"text":"Power","value":"A"},{"text":"Work","value":"B"},{"text":"Pressure","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":155213,"question":"The work done by a force, keeping an object in circular motion with constant speed is:","choices":[{"text":"Zero J","value":"A"},{"text":"1 J","value":"B"},{"text":"0.1 J","value":"C"},{"text":"0.01 J","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155211,"question":"Which force is not a conservative force?","choices":[{"text":"Frictional force","value":"A"},{"text":"Gravitational force","value":"B"},{"text":"Electric force","value":"C"},{"text":"Elastic spring force","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":155210,"question":"A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:","choices":[{"text":"Minimum Work","value":"A"},{"text":"Maximum Work","value":"B"},{"text":"Zero Work","value":"C"},{"text":"Negative Work","value":"D"},{"value":"E"}],"correctAnswer":3}]