[{"id":146033,"question":"With the increase of temperature viscosity","choices":[{"text":"Increase","value":"A"},{"text":"Decrease","value":"B"},{"text":"Remains same","value":"C"},{"text":"Doubles","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":146032,"question":"Ball pen function on the principle of","choices":[{"text":"Viscosity","value":"A"},{"text":"Boyle's law","value":"B"},{"text":"Gravitational force","value":"C"},{"text":"Surface tension","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":146031,"question":"A person standing near the track of a fast moving train has tendency to fall towards it because of","choices":[{"text":"Vibration due to motion of train","value":"A"},{"text":"Gravitation force of attraction between person and trains","value":"B"},{"text":"The high speed of train","value":"C"},{"text":"Some other effect","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":146030,"question":"Surface tension of water is due to","choices":[{"text":"Inter molecular attractions","value":"A"},{"text":"Intermolecular spaces","value":"B"},{"text":"Inter molecular repulsion","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":146029,"question":"Bernoulli's equation is based upon law of conservation","choices":[{"text":"Mass","value":"A"},{"text":"Momentum","value":"B"},{"text":"Energy","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":146028,"question":"The velocity of falling raindrops attains limited value because of","choices":[{"text":"Up thrust of air","value":"A"},{"text":"Viscous force exerted by air","value":"B"},{"text":"Surface tension effect","value":"C"},{"text":"Air currents atmosphere","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":146027,"question":"A person standing on a rotating platform has his hands lowered. He suddenly outstretches his arms. The angular momentum","choices":[{"text":"Becomes zero","value":"A"},{"text":"Increases","value":"B"},{"text":"Decreases","value":"C"},{"text":"Remains the same","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":146026,"question":"What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value, the mass remaining constant?","choices":[{"text":"12","value":"A"},{"text":"6","value":"B"},{"text":"3","value":"C"},{"text":"2","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":146025,"question":"In which case application of angular velocity is useful?","choices":[{"text":"When a body is rotating","value":"A"},{"text":"When velocity of body is in a straight line","value":"B"},{"text":"When velocity is in a straight line","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":146024,"question":"A couple produces","choices":[{"text":"Purely linear motion","value":"A"},{"text":"Purely rotational motion","value":"B"},{"text":"Linear and rotational motion","value":"C"},{"text":"No motion","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":146023,"question":"Centre of mass is a point","choices":[{"text":"Which is geometric centre of a body","value":"A"},{"text":"From which distance of particles are same","value":"B"},{"text":"Where the whole mass of the body is supposed to be centered","value":"C"},{"text":"Which is the origin of reference frame","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":146022,"question":"If the earth were to rotate faster, than its present speed the weight of an object will","choices":[{"text":"Increase at the equator but remain unchanged at the poles","value":"A"},{"text":"Decrease at the equator but remain unchanged at the poles","value":"B"},{"text":"Remain unchanged at the decrease but decrease at the poles","value":"C"},{"text":"Remain unchanged at the equator but increase at the poles","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":146021,"question":"What remains constant when the earth revolves around the sun?","choices":[{"text":"Angular momentum","value":"A"},{"text":"Linear momentum","value":"B"},{"text":"Angular kinetic energy","value":"C"},{"text":"Linear kinetic energy","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":146020,"question":"What remains constant in the field of central force?","choices":[{"text":"Potential energy","value":"A"},{"text":"Kinetic energy","value":"B"},{"text":"Angular momentum","value":"C"},{"text":"Linear momentum","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":146019,"question":"Angular momentum is","choices":[{"text":"Vector (axial)","value":"A"},{"text":"Vector (polar)","value":"B"},{"text":"Scalar","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1}]