[{"id":252649,"question":"A ball takes ‘t’ second to fall from a height 𝒉𝟏 and ‘2t’ second to fall from a height 𝒉𝟐\r\nthen h1/h2 is:","choices":[{"text":"2","value":"A"},{"text":"4","value":"B"},{"text":"0.5","value":"C"},{"text":"0.25","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252648,"question":"In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest\r\npoint reached is T. The vertical component of acceleration of stone is:","choices":[{"text":"Zero at T","value":"A"},{"text":"Greatest at T","value":"B"},{"text":") Greatest at P","value":"C"},{"text":"the same at P as at T","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252645,"question":"<div>Two projectiles ‘A’ and ‘B’ are thrown with same speed but at angle of 40 degree and 50 degree with the horizontal. The horizontal range of ‘A’ will be:</div>","choices":[{"text":"Equal to that of ‘B’","value":"A"},{"text":"Greater than that of ‘B’","value":"B"},{"text":"Less than that of ‘B’","value":"C"},{"text":"4/5times that of ‘B’","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252640,"question":"<div>A machine gun fires ‘n’ bullets per second and the mass of each bullet is m. If v is the speed of each bullet then the force exerted on the machine gun is:</div>","choices":[{"text":"<i>mng</i>","value":"A"},{"text":"<i>mnv</i>","value":"B"},{"text":"<i>mnvg</i>","value":"C"},{"text":"<i>mnv/g</i>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252611,"question":"<div>A particle executing one dimensional motion, finally comes to rest, what will be the angle between acceleration and displacement during motion:</div>","choices":[{"text":"0","value":"A"},{"text":"<i>π</i>","value":"B"},{"text":"<div>𝜋/2</div>","value":"C"},{"text":"<div>𝜋/4</div>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252547,"question":"<div>A particle executing one dimensional motion, finally comes to rest, what will be the angle between</div><div>acceleration and displacement during motion:</div>","choices":[{"text":"0","value":"A"},{"text":"π","value":"B"},{"text":"<div>𝜋/2</div>","value":"C"},{"text":"𝜋/4","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252512,"question":"The distance covered by a body in time ‘t’ starting from rest is:","choices":[{"text":"1/2 𝑡<sup>2</sup>","value":"A"},{"text":"<i>vt</i>","value":"B"},{"text":"𝑎𝑡<sup>2</sup>","value":"C"},{"text":"𝑎𝑡<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163128,"question":"Most motorbikes have ____________ cylinder/s engine but cars usually have _________ cylinders on the same crankshaft.","choices":[{"text":"Four , Six","value":"A"},{"text":"One , four","value":"B"},{"text":"two , five","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163126,"question":"No of spark plugs needed in diesel engine is:","choices":[{"text":"Four","value":"A"},{"text":"Five","value":"B"},{"text":"Six","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163125,"question":"A certain engine coverts 20% of available heat energy into work. Then its efficiency will be:","choices":[{"text":"20%","value":"A"},{"text":"80%","value":"B"},{"text":"50%","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163124,"question":"Diesel engine coverts ____________ of available heat energy into work.","choices":[{"text":"20% to 25%","value":"A"},{"text":"25% to 30%","value":"B"},{"text":"30% to 35%","value":"C"},{"text":"35% to 40%","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163122,"question":"Petrol engine coverts ____________ of available heat energy into work.","choices":[{"text":"20% to 25%","value":"A"},{"text":"25% to 30%","value":"B"},{"text":"30% to 35%","value":"C"},{"text":"35% to 40%","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163120,"question":"One degree of thermodynamics scale of temperature is called:","choices":[{"text":"Celsius","value":"A"},{"text":"Fahrenheit","value":"B"},{"text":"Kelvin","value":"C"},{"text":"Radian","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163118,"question":"The efficiency of a practical heat engine:","choices":[{"text":"Can be 100%","value":"A"},{"text":"Can not be 100%","value":"B"},{"text":"Is always Zero","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163116,"question":"Carnot engine is ____________ heat engine.","choices":[{"text":"A reversible","value":"A"},{"text":"An irreversible","value":"B"},{"text":"An ideal","value":"C"},{"text":"Both A and C","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163114,"question":"If temperature of the sink is decreased, efficiency of a carnot engine.","choices":[{"text":"Remains constant","value":"A"},{"text":"Decreases","value":"B"},{"text":"Increases","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163112,"question":"What will be efficiency of carnot engine when it is operated between the temperatures 47<sup>o</sup>C and 127 <sup>o</sup>C:","choices":[{"text":"Reversible","value":"A"},{"text":"Irreversible","value":"B"},{"text":"Sometimes A and B","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163107,"question":"The ratio of output work per cycle to input energy per cycle is called:","choices":[{"text":"Entropy","value":"A"},{"text":"Internal energy","value":"B"},{"text":"Efficiency","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163104,"question":"As the working substance of a heat engine completes a cycle, there is no change in:","choices":[{"text":"Internal energy","value":"A"},{"text":"Pressure","value":"B"},{"text":"Volume","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163103,"question":"The law of thermodynamics which discusses the condition under which heat energy is converted into and equivalent amount of work is:","choices":[{"text":"1st","value":"A"},{"text":"2nd","value":"B"},{"text":"3rd","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163100,"question":"Steam engine is:","choices":[{"text":"An optical system","value":"A"},{"text":"A thermal system","value":"B"},{"text":"A thermodynamic system","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163099,"question":"If the temperature difference between hot and cold body is greater the heat engine is:","choices":[{"text":"Not efficient","value":"A"},{"text":"Less efficient","value":"B"},{"text":"More efficient","value":"C"},{"text":"NOne of above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163097,"question":"If C<sub>v</sub>donotes molar specific heat at constant volume and𝜟 T is the change in temperature, then C<sub>v</sub>𝜟<sub></sub>T gives:","choices":[{"text":"Volume","value":"A"},{"text":"Pressure","value":"B"},{"text":"Energy","value":"C"},{"text":"Entropy","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163094,"question":"A process in which no heat enters or leaves the system is called.","choices":[{"text":"Adiabatic process","value":"A"},{"text":"Isothermal process","value":"B"},{"text":"Isochoric process","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163092,"question":"The equation PVr = Constant applies to:","choices":[{"text":"Isothermal process","value":"A"},{"text":"Adiabatic process","value":"B"},{"text":"Isobaric process","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163090,"question":"A process which is carried at constant temperature and Boyle's law can be applied is called:","choices":[{"text":"Adiabatic process","value":"A"},{"text":"Isothermal process","value":"B"},{"text":"Isochoric process","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163089,"question":"The equation W = ________𝜟U represents:","choices":[{"text":"Thermal process","value":"A"},{"text":"adiabatic process","value":"B"},{"text":"Isobaric process","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163088,"question":"The value of universal gas constant R is:","choices":[{"text":"8.314 J/K mole K","value":"A"},{"text":"8314 J/ mole K","value":"B"},{"text":"8.314 J/ mole K","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163087,"question":"While dealing with the processes i thermodynamics, the working substances is usually:","choices":[{"text":"Oxygen gas","value":"A"},{"text":"Hydrogen gas","value":"B"},{"text":"Ideal gas","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163078,"question":"The time period of a simple pendulum is 1 second. If g = 9.8 m /sec<sup>2</sup>, then length of the simple pendulum will be:","choices":[{"text":"380 m","value":"A"},{"text":"0.25 m","value":"B"},{"text":"2.5 m","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163076,"question":"A second's pendulum completes 5 vibrations in:","choices":[{"text":"5 seconds","value":"A"},{"text":"10 seconds","value":"B"},{"text":"2.5 seconds","value":"C"},{"text":"15 seconds","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163074,"question":"Which of the following quantities /quantity becomes zero at any moment during oscillation.","choices":[{"text":"Speed","value":"A"},{"text":"Acceleration","value":"B"},{"text":"Momentum","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":163072,"question":"A small bob is swung from a rope 2.45 m long. Its period of oscillation is:","choices":[{"text":"3.14 seconds","value":"A"},{"text":"4.72 seconds","value":"B"},{"text":"6.82 seconds","value":"C"},{"text":"8.35 seconds","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163070,"question":"The length of second's pendulum at a place where g=980 cm/sec<sup>2</sup>is:","choices":[{"text":"77 cm","value":"A"},{"text":"88.1 cm","value":"B"},{"text":"99.2 cm","value":"C"},{"text":"100.3 cm","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":163069,"question":"Second's pendulum is the pendulum whose time period is:","choices":[{"text":"1 second","value":"A"},{"text":"2 second","value":"B"},{"text":"3 second","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163068,"question":"The frequency of second's pendulum is:","choices":[{"text":"0.5 Hz","value":"A"},{"text":"1.0 Hz","value":"B"},{"text":"1.5 Hz","value":"C"},{"text":"2 Hz","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163067,"question":"When a simple pendulum swings, which of the following quantities does not become zero throughout the oscillation?","choices":[{"text":"Speed","value":"A"},{"text":"weight","value":"B"},{"text":"Acceleration","value":"C"},{"text":"Momentum","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163066,"question":"Which of the following is responsible for the motion of the bob of the simple pendulum:","choices":[{"text":"mg sin𝜽","value":"A"},{"text":"Tension T","value":"B"},{"text":"mg cos𝜽","value":"C"},{"text":"mg","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":163065,"question":"The tension T in the string of a simple pendulum acts:","choices":[{"text":"Velocity down load","value":"A"},{"text":"Along the string","value":"B"},{"text":"Vertically upward","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":163064,"question":"The string of simple pendulum should be:","choices":[{"text":"Heavy","value":"A"},{"text":"Extensible","value":"B"},{"text":"Inextensible","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3}]