Physics Questions Practice Question and Answer

Q:

Choose the correct statement

585 0

  • 1
    A body can be accelerated by frictional force
    Correct
    Wrong
  • 2
    There can be zero friction
    Correct
    Wrong
  • 3
    Kinetic friction is greater than rolling friction
    Correct
    Wrong
  • 4
    Frictional force and area of contact between the two surfaces are proportional
    Correct
    Wrong
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Answer : 3. "Kinetic friction is greater than rolling friction "

Q:

A wire loop is rotated in a magnetic field such that the frequency of change of direction of the induced emf is

398 0

  • 1
    Six times per revolution
    Correct
    Wrong
  • 2
    Four times per revolution
    Correct
    Wrong
  • 3
    Twice per revolution
    Correct
    Wrong
  • 4
    Once per revolution
    Correct
    Wrong
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Answer : 3. "Twice per revolution"

Q:

Consider an inductor whose linear dimensions are tripled and the total number of turns per unit length is kept constant, what happens to the self-inductance?

549 0

  • 1
    9 times
    Correct
    Wrong
  • 2
    3 times
    Correct
    Wrong
  • 3
    27 times
    Correct
    Wrong
  • 4
    1/3 times
    Correct
    Wrong
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Answer : 2. "3 times "

Q:

What is the ratio of power dissipated if two electric bulbs are connected in series and the ratio of their resistance is 1:2?

368 0

  • 1
    1:4
    Correct
    Wrong
  • 2
    1:2
    Correct
    Wrong
  • 3
    2:1
    Correct
    Wrong
  • 4
    1:1
    Correct
    Wrong
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Answer : 2. "1:2"

Q:

Consider copper and aluminum wire whose length and resistance are the same. Also, the specific resistance of aluminum is more than copper. Select the correct statement

465 0

  • 1
    Copper and aluminum mass are the same
    Correct
    Wrong
  • 2
    Copper wire has more mass than the aluminum wire
    Correct
    Wrong
  • 3
    Copper wire has less mass than the aluminum wire
    Correct
    Wrong
  • 4
    The information given is incomplete
    Correct
    Wrong
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Answer : 4. "The information given is incomplete "

Q:

Why do the astronauts in the international space station experience weightlessness?

343 0

  • 1
    The acceleration due to gravity at that height is Zero
    Correct
    Wrong
  • 2
    They are falling towards the earth
    Correct
    Wrong
  • 3
    They have specially designed spacesuits for this purpose
    Correct
    Wrong
  • 4
    The gravity of the moon and earth cancel out at that altitude
    Correct
    Wrong
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Answer : 2. "They are falling towards the earth"

Q:

For an object experiencing weightlessness _____

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  • 1
    its weight force is non-zero
    Correct
    Wrong
  • 2
    it has inertia
    Correct
    Wrong
  • 3
    it experiences a value of acceleration greater than the acceleration due to gravity
    Correct
    Wrong
  • 4
    it experiences a value of acceleration lesser than the acceleration due to gravity
    Correct
    Wrong
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Answer : 2. "it has inertia"

Q:

How much is polar orbit inclination with the earth's equatorial plane?

372 0

  • 1
    0 degrees
    Correct
    Wrong
  • 2
    45 degrees
    Correct
    Wrong
  • 3
    90 degrees
    Correct
    Wrong
  • 4
    180 degrees
    Correct
    Wrong
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Answer : 3. "90 degrees"

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