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| 341)To start a loaded trolley bag, one has to exert more force than when it is moving. This is an example of - | |||
| Newton's Second law of motion | Newton's First law of motion | ||
| Newton's Thirs law of motion | First law of thermodynamics | ||
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| 342)An ice ball floats in a water tank, when the ice melts the water level will | |||
| Rise | Fall down | ||
| No change | None of these | ||
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| 343)In scuba diving, while ascending towards the water surface, there is a danger of bursting the lungs, it is because | |||
| Boyle's law | Grahams's law of diffusion | ||
| Henry's law | Archimede's Principle | ||
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| 344)Lack of atmosphere around the moon is due to | |||
| Low gravitational attraction | High escape velocoty of air molecule low gravitational attraction | ||
| Low escape velocoty of air molecule low gravitational attraction | High escape velocoty of air molecule | ||
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| 345)When we pull out the plug connected to an electrical appliance, we often observe a spark, To which property of the appliance is it related? | |||
| Inductance | Resistance | ||
| Wattage | Capacitance | ||
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| 346)If the door of a running refrigerator in a closed room is kept open, waht will be the net effect on the room? | |||
| It will heat the room | It will cool the room | ||
| It will make no difference on the average | It will make temperature up and down | ||
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| 347)Which one of the following pairs of physical quantities has the same dimension? | |||
| Latent heat and specific heat | surface tension and tension | ||
| Acceleration due to gravity and gravitational constant | Momentum and impulse | ||
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| 348)If the spinning speed of the earth is increased then the weight of body at the equator will | |||
| Increase | Decrease | ||
| No change | Double | ||
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| 349)Transformer is used in between the electric power station and homes or factories in order to | |||
| Minimise the power loss in transmission cables | Minimise the voltage loss in transmission cables | ||
| Keep the voltage constant at the user end | Minimise the current loss in transmission cables | ||
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| 350)Confirmation of the presence of Higgs Boson will justify | |||
| The steady state model of the universe | Both the standard model and superstring theory | ||
| The mass of the fundamental particle | None of these | ||
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| 351)Tsunami causes devastation near the coast of the sea because the speed of the sonic waves generated at the epicentre is | |||
| directly proportional to the depth of the sea | inversely proportional to the depth of the sea | ||
| inversely proportional to the distance between the coast and epicentre | directly proportional to the distance between the coast and epicentre | ||
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| 352)Hydraulic bracks and hydralic lifts are divices in which fluids are used for transmitting | |||
| Momentun | Power | ||
| Pressure | None of these | ||
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| 353)When a bar magnet is cut into two equal halves, the pole strength of each piece | |||
| becomes half | becomes double | ||
| becomes quadraple | remain same | ||
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| 354)A body initially at rest is acted upon by a constant force. The rate of change of its kinetic energy varies | |||
| Linearly with square root of time | Linearly with time | ||
| Inversely with time | Linearly with square of time | ||
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| 355)The major cause of blurring and unsharp images of objects observed through very large telescope at the extreme limit of magnification is | |||
| Poor optical polish achievable on large mirrors | Verying density of air in the earth' atmosphere | ||
| Poor tracking capacities of telescopes | Air turbulance of earth's atmosphere | ||
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