Physics Practice Question and Answer
6 Q: Why do the astronauts in the international space station experience weightlessness?
663 063c7a8631e8e3f3e1a3590ed
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: What is the ratio of power dissipated if two electric bulbs are connected in series and the ratio of their resistance is 1:2?
661 063c8d8afbd6d90332091d175
63c8d8afbd6d90332091d175- 11:4false
- 21:2true
- 32:1false
- 41:1false
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Answer : 2. "1:2"
Q: What happens to the force acting between the charged particles, if the distance between these charged particles is halved?
657 063c8e92bbdbddb32fda08d59
63c8e92bbdbddb32fda08d59- 1It increases by four timestrue
- 2It gets doubledfalse
- 3It becomes halffalse
- 4It reduces by one-fourthfalse
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Answer : 1. "It increases by four times "
Explanation :
So, when the distance between the two charges is halved, the force is increased four times.
Q: How much is polar orbit inclination with the earth's equatorial plane?
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63c7a5d8bdbddb32fd9cc70c- 10 degreesfalse
- 245 degreesfalse
- 390 degreestrue
- 4180 degreesfalse
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Answer : 3. "90 degrees"
Q: Identify the correct statement.
592 0649aa3043662c8741dfd960b
649aa3043662c8741dfd960b- 1Newton is a unit of force.true
- 2Newton is a unit of power.false
- 3Joule is a unit of force.false
- 4Joule is a unit of power.false
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Answer : 1. "Newton is a unit of force."
Explanation :
1. Newton is the SI unit of force. It is a unit force that causes an acceleration of one meter per second on one kilogram of mass.
- Force can be defined as:
Force =Mass x Acceleration
2. Joule is the SI unit of energy and work. It is the unit work done by one Newton force over a distance of one meter.
- Energy can be defined as:
Energy = Work x Time
Q: What makes a virtual image of a real object?
1 05f6da2bdec13dd748004c084
5f6da2bdec13dd748004c084- 1convex mirrorfalse
- 2plane mirrortrue
- 3concave mirrorfalse
- 4All of thesefalse
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