Physics MCQs

Page No. 70

In vibrating cord the points where the amplitude is maximum, are called ___________________?


aantinodes

✓


bnodes

✖


ctroughs

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dcrests

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View Answer antinodes

The distance between any two consecutive crests or troughs is called____________________?


afrequency

✖


bperiod

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cWave length

✓


dphase difference

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View Answer Wave length

Waves transmit ________________ from one place to another?


aenergy

✓


bmass

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cboth

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d none

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View Answer energy

The range of the projectile at 30 deg and 60 deg are__________________?


aequal to 45 deg

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bequal to 90 deg

✖


cequal to each other

✓


dnone of the above

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View Answer equal to each other

The force beared by a wall on which water strikes normally at a speed of 10m/sec and at a discharge of 0.0001m3/sec is__________________?


a1 N

✓


b10 N

✖


c100 N

✖


dnone

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View Answer 1 N

The trajectory (or path) of a projectile is_________________?


astraight line

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bparabola

✓


chyperbola

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d circle

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View Answer parabola

The distance covered by a body in time t starting from rest is__________________?


aat2/2

✓


bVt

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ca2t/2

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d at2

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View Answer at2/2

When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________?


a5m/s, 1m/s

✓


b 3m/s, 3m/s

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c6m/s, 1m/s

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d4m/s, 2m/s

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View Answer 5m/s, 1m/s

The thrust on the rocket in the absence of gravitational force of attraction is__________________?


aConstant

✓


b not constant

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cconstant if the rate of ejected gases is constant

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dconstant for short range rocket.

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View Answer Constant

Which of the following is not an example of projectile motion ?


aa gas filled ballon

✓


bbullet fired from gun

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c a football kicked

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da base ball shot

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View Answer a gas filled ballon

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