Physics Questions Practice Question and Answer
8 Q: Find the molecular mass of a gas that takes three times more time to effuse as compared to He with the same volume
759 063c8f8598731ac33279f04bb
63c8f8598731ac33279f04bb- 19 ufalse
- 264 utrue
- 327 ufalse
- 436 ufalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "64 u"
Explanation :
Its molecular mass will be: 64u.
Q: The amount of work done in moving a charge of 4C across two points having a potential difference of 6V is ______.
748 0641974a1b34a0b67fcf4a8bf
641974a1b34a0b67fcf4a8bf- 148 Jfalse
- 212 Jfalse
- 336 Jfalse
- 424 Jtrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "24 J"
Q: Which among the following instruments is used to measure either direct or alternating electric current?
663 064b17cd02dc867f593e95d61
64b17cd02dc867f593e95d61- 1Wattmeterfalse
- 2Hygrometerfalse
- 3Ammetertrue
- 4Pyrometerfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "Ammeter"
Explanation :
1. The device which is used to measure electric current in an electric circuit is called ammeter.
2. The resistance of an ideal ammeter is always zero and the electric circuit is always connected in series.
Q: In which year was the Doppler effect discovered by Austrian scientist Christian Doppler, which describes the change in frequency of any kind of sound or light wave produced by a moving source with respect to an observer?
657 064b18288568e7ff594a2d3ec
64b18288568e7ff594a2d3ec- 11846false
- 21844false
- 31842true
- 41840false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "1842"
Explanation :
The Doppler effect was discovered by Austrian scientist Christian Doppler in 1842, describing the change in frequency of any type of sound or light wave produced by a moving source with respect to an observer.
Q: Why do the astronauts in the international space station experience weightlessness?
656 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
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "They are falling towards the earth"
Q: According to Dalton’s atomic theory, atoms combine in the ratio of small whole numbers to form ______.
656 064919f9ec7d7c7e0670d10b8
64919f9ec7d7c7e0670d10b8- 1Neutronsfalse
- 2Moleculesfalse
- 3Protonsfalse
- 4Compoundstrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Compounds"
Explanation :
1. According to Dalton's atomic theory, atoms combine in small whole-number proportions to form compounds.
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?
654 063c8d8afbd6d90332091d175
63c8d8afbd6d90332091d175- 11:4false
- 21:2true
- 32:1false
- 41:1false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "1:2"
Q: What happens to the force acting between the charged particles, if the distance between these charged particles is halved?
648 063c8e92bbdbddb32fda08d59
63c8e92bbdbddb32fda08d59- 1It increases by four timestrue
- 2It gets doubledfalse
- 3It becomes halffalse
- 4It reduces by one-fourthfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "It increases by four times "
Explanation :
So, when the distance between the two charges is halved, the force is increased four times.