NAT I Engineering Physics With Answers

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NAT I Engineering Physics

Sr. # Questions Answers Choice
1 Surface tension of water is due to Inter molecular attraction Intermolecular spaces Inter molecular repulsion None of above
2 Bernoulli's equation is based upon law of conservation Mass Momentum Energy None of these
3 The terminal velocity of a small size spherical body of radius R moving in a fluid varies as R R<sup>2</sup> 1/R (1/R)<sup>2</sup><br>
4 The velocity of falling raindrops attains limited value because of Up thrust of air VIscous force exerted by air Surface tension effect Air currents atmosphere
5 A person standing on a rotating platform has his hands lowered He suddenly outstretches his arms.The angular momentum Becomes zero Increases Decreases Remains the same
6 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? 12 6 3 2
7 In which case application of angular velocity is useful? When a body is rotating When velocity of body is in a straight line When velocity is in a straight line None of these
8 A couple produces Purely linear motion Purely rotational motion Linear and rotational motion No motion
9 Center of mass is a point Which is geometric center of a body From which distance of particles are same Where the whole mass of the body is supposed to be centered Which is the origin of reference frame
10 If the earth were to rotate faster than its present speed the weight of an object will Increase at the equator but remain unchanged at the poles Decrease at the equator but remain unchanged at the poles Remain unchanged at the decrease but decrease at the poles Remain unchanged at the equator but increase at the poles
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