[{"id":153815,"question":"One KWh is equal to:","choices":[{"text":"3.6 x 10<sup>2</sup>J","value":"A"},{"text":"3.6 KJ","value":"B"},{"text":"3.6 x 10<sup>1</sup>KJ","value":"C"},{"text":"3.6 MJ","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":153814,"question":"The velocity given to a body to go out of the influence of earth's gravity is known as:","choices":[{"text":"Terminal velocity","value":"A"},{"text":"Orbital velocity","value":"B"},{"text":"Escape velocity","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":153813,"question":"When two protons 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":153812,"question":"A body of weight 1 N has a kinetic energy of 1 joule when its speed is:","choices":[{"text":"1.46 m sec<sup>-1</sup>","value":"A"},{"text":"2.44 m sec<sup>-1</sup>","value":"B"},{"text":"3.42 m sec<sup>-1</sup>","value":"C"},{"text":"4.43 m sec<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":153811,"question":"Tick the conservation force:","choices":[{"text":"Tension in a string","value":"A"},{"text":"Air resistance string","value":"B"},{"text":"Elastic spring force","value":"C"},{"text":"Frictional force","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":153810,"question":"Work done along a closed path in a gravitational field is:","choices":[{"text":"Maximum","value":"A"},{"text":"Minimum","value":"B"},{"text":"Zero","value":"C"},{"text":"Unity","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121958,"question":"A body whose momentum is constant must have constant","choices":[{"text":"Acceleration","value":"A"},{"text":"Velocity","value":"B"},{"text":"Force","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121956,"question":"Swimming is based on the principle of","choices":[{"text":"Newton's 1st law","value":"A"},{"text":"Newton's 2nd law","value":"B"},{"text":"Newton's 3rd law","value":"C"},{"text":"All","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121954,"question":"If rope of lift breaks suddenly. The tension exerted by the surface of lift is (a=Acceleration of lift)","choices":[{"text":"mg","value":"A"},{"text":"m (g+a)","value":"B"},{"text":"m (g - a)","value":"C"},{"text":"0","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121950,"question":"A body of mass 1.0 kg is falling with an acceleration of 10 m/s<sup>2</sup>. Its apparent weight will be (g=10 m/s<sup>2</sup>)","choices":[{"text":"1.0 kg wt","value":"A"},{"text":"2.0 kg wt","value":"B"},{"text":"0.5 kg wt","value":"C"},{"text":"Zero","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121949,"question":"When a body is moving on a surface, the force of friction is called","choices":[{"text":"Static friction","value":"A"},{"text":"Dynamic friction","value":"B"},{"text":"Limiting friction","value":"C"},{"text":"Rolling friction","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":121947,"question":"A railway engine (mass 10<sup>4</sup>kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is","choices":[{"text":"3,600 N","value":"A"},{"text":"7,200 N","value":"B"},{"text":"10,000 N","value":"C"},{"text":"100,000 N","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121943,"question":"When a horse pulls a cart, the force that makes the horse run forward is the force exerted by","choices":[{"text":"The horse on the ground","value":"A"},{"text":"The horse on the cart","value":"B"},{"text":"The ground on the horse","value":"C"},{"text":"The ground on the cart","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":121941,"question":"When a bicycle is in motion, the frictional forces exerted by the ground are","choices":[{"text":"In the forward direction on both the wheels","value":"A"},{"text":"In the backward direction on both the wheels","value":"B"},{"text":"In the forward direction on the front wheel and the backward direction on the rear wheel","value":"C"},{"text":"In the backward direction on the front wheel and the forward direction on the rear wheel","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":121940,"question":"In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is","choices":[{"text":"Mg","value":"A"},{"text":"1/2 Mg","value":"B"},{"text":"Zero","value":"C"},{"text":"2 Mg","value":"D"},{"value":"E"}],"correctAnswer":4}]