EdgineerX

1501. The component of the weight of a body along an incline of angle theta is

A. mg/sin theta B. mg tan theta C. mg cos theta D. mg E. mg sin theta

1502. A body resting in a position such that any small displacement raises its centre of gravity is in

A. dynamic equilibrium B. unstable equilibrium C. neutral equilibrium D. stable equilibrium E. no equilibrium

1503. The point at which the entire weight of a body may be considered to act is the

A. centroid of the surface B. centre of gravity C. point of suspension D. metacentre E. centre of mass only in space

1504. A torque that tends to produce anticlockwise rotation is conventionally taken as

A. undefined B. negative C. positive D. equal to the force E. zero

1505. The impulse delivered to a body equals the area under a graph of

A. acceleration against time B. force against time C. force against displacement D. velocity against time E. momentum against time

1506. Airbags and seat belts reduce injury in a collision by

A. increasing the time over which the momentum changes B. increasing the force on the passenger C. reducing the change in momentum D. reversing the momentum E. reducing the mass of the passenger

1507. Two cars travel in the same direction at 30 m s-1 and 20 m s-1. The velocity of the first relative to the second is

A. 25 m s-1 B. zero C. 50 m s-1 D. 600 m s-1 E. 10 m s-1

1508. The thrust developed by a rocket depends on the rate of ejection of gases and their

A. temperature only B. pressure at the nozzle only C. colour D. exhaust speed relative to the rocket E. density at sea level

1509. A block slides down a frictionless incline of angle 30 degrees. Its acceleration is about

A. zero B. 2.45 m s-2 C. 8.5 m s-2 D. 9.8 m s-2 E. 4.9 m s-2

1510. For a projectile, the vertical component of velocity at the instant of landing on level ground is

A. equal in magnitude to the initial vertical component B. twice the initial vertical component C. equal to the horizontal component D. zero E. maximum at the top

1511. The work done by gravity on a body carried around a closed path and returned to its starting point is

A. equal to the kinetic energy B. equal to mgh C. positive D. zero E. negative

1512. Which of the following is a non-conventional energy source?

A. petroleum B. tidal energy C. coal D. furnace oil E. natural gas

1513. Geothermal energy is obtained from

A. wind B. heat within the Earth's crust C. burning biomass D. sunlight directly E. the tides

1514. A body slides down a smooth curved track from height h. Its speed at the bottom is

A. sqrt(gh/2) B. 2gh C. sqrt(2gh) D. sqrt(gh) E. gh

1515. The total kinetic energy of a body rolling without slipping is the sum of

A. rotational and translational kinetic energies B. angular momentum and torque C. translational kinetic energy and potential energy D. two rotational kinetic energies E. kinetic energy and work done

1516. For a satellite in a stable circular orbit, the required centripetal force is provided by

A. the normal reaction B. atmospheric pressure C. magnetic forces D. gravitational attraction of the Earth E. the thrust of its engines

1517. The instrument used to measure blood pressure is the

A. sphygmomanometer B. venturimeter C. hydrometer D. manometer E. barometer

1518. Normal systolic and diastolic blood pressures for a healthy adult are about

A. 12 and 8 mm of mercury B. 200 and 100 mm of mercury C. 760 and 120 mm of mercury D. 80 and 120 mm of mercury respectively E. 120 and 80 mm of mercury respectively

1519. The work required to increase the surface area of a liquid is stored as

A. heat only B. pressure energy C. surface energy D. kinetic energy E. elastic energy of the container

1520. A streamline in steady fluid flow is a line such that

A. the density varies along it B. the fluid speed is constant along it C. the tangent at every point gives the direction of the fluid velocity there D. the pressure is constant along it E. two streamlines may cross

1521. Simple harmonic motion may be regarded as the projection on a diameter of

A. uniform circular motion B. a damped decay C. a parabolic path D. random motion E. a straight line motion

1522. The maximum acceleration of a body in SHM of amplitude x0 and angular frequency omega is

A. omega x0 B. omega squared x0 C. omega squared divided by x0 D. x0 divided by omega E. omega x0 squared

1523. The time period of a simple pendulum is independent of

A. the square root of the length B. the location on Earth C. its length D. the mass of the bob E. the value of g

1524. When a transverse pulse on a string is reflected from a rigid support, it undergoes a phase change of

A. 90 degrees B. 0 degrees C. 270 degrees D. 360 degrees E. 180 degrees

1525. If the distance from a point source of sound is doubled, the intensity becomes

A. four times B. half C. one quarter D. double E. unchanged

Physics