Physics Practice Question and Answer
8 Q: The amount of work done in moving a charge of 4C across two points having a potential difference of 6V is ______.
467 0641974a1b34a0b67fcf4a8bf
641974a1b34a0b67fcf4a8bf- 148 Jfalse
- 212 Jfalse
- 336 Jfalse
- 424 Jtrue
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Answer : 4. "24 J"
Q: Choose the correct statement
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63c910807efeed32fc20e26c- 1A body can be accelerated by frictional forcefalse
- 2There can be zero frictionfalse
- 3Kinetic friction is greater than rolling frictiontrue
- 4Frictional force and area of contact between the two surfaces are proportionalfalse
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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
402 063c8dfd58731ac33279e451b
63c8dfd58731ac33279e451b- 1Six times per revolutionfalse
- 2Four times per revolutionfalse
- 3Twice per revolutiontrue
- 4Once per revolutionfalse
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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?
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63c8df46bdbddb32fda053ad- 19 timesfalse
- 23 timestrue
- 327 timesfalse
- 41/3 timesfalse
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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?
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63c8d8afbd6d90332091d175- 11:4false
- 21:2true
- 32:1false
- 41:1false
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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
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63c8d853b338bc336f0c3de7- 1Copper and aluminum mass are the samefalse
- 2Copper wire has more mass than the aluminum wirefalse
- 3Copper wire has less mass than the aluminum wirefalse
- 4The information given is incompletetrue
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Answer : 4. "The information given is incomplete "
Q: Why do the astronauts in the international space station experience weightlessness?
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63c7a8631e8e3f3e1a3590ed- 1The acceleration due to gravity at that height is Zerofalse
- 2They are falling towards the earthtrue
- 3They have specially designed spacesuits for this purposefalse
- 4The gravity of the moon and earth cancel out at that altitudefalse
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Answer : 2. "They are falling towards the earth"
Q: For an object experiencing weightlessness _____
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63c7a79dbdbddb32fd9ccd6a- 1its weight force is non-zerofalse
- 2it has inertiatrue
- 3it experiences a value of acceleration greater than the acceleration due to gravityfalse
- 4it experiences a value of acceleration lesser than the acceleration due to gravityfalse
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