Physics Questions Practice Question and Answer
8 Q: Which of the following elements has the lowest melting point?
811 062de6dd1313eb40eb89fc72f
62de6dd1313eb40eb89fc72f- 1Chromiumfalse
- 2Hydrogentrue
- 3Zincfalse
- 4Silverfalse
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Answer : 2. "Hydrogen"
Q: Find the molecular mass of a gas that takes three times more time to effuse as compared to He with the same volume
801 063c8f8598731ac33279f04bb
63c8f8598731ac33279f04bb- 19 ufalse
- 264 utrue
- 327 ufalse
- 436 ufalse
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Answer : 2. "64 u"
Explanation :
Its molecular mass will be: 64u.
Q: Which among the following instruments is used to measure either direct or alternating electric current?
722 064b17cd02dc867f593e95d61
64b17cd02dc867f593e95d61- 1Wattmeterfalse
- 2Hygrometerfalse
- 3Ammetertrue
- 4Pyrometerfalse
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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?
715 064b18288568e7ff594a2d3ec
64b18288568e7ff594a2d3ec- 11846false
- 21844false
- 31842true
- 41840false
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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: How much is polar orbit inclination with the earth's equatorial plane?
712 063c7a5d8bdbddb32fd9cc70c
63c7a5d8bdbddb32fd9cc70c- 10 degreesfalse
- 245 degreesfalse
- 390 degreestrue
- 4180 degreesfalse
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Answer : 3. "90 degrees"
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?
707 063c8d8afbd6d90332091d175
63c8d8afbd6d90332091d175- 11:4false
- 21:2true
- 32:1false
- 41:1false
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Answer : 2. "1:2"
Q: Why do the astronauts in the international space station experience weightlessness?
705 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: According to Dalton’s atomic theory, atoms combine in the ratio of small whole numbers to form ______.
693 064919f9ec7d7c7e0670d10b8
64919f9ec7d7c7e0670d10b8- 1Neutronsfalse
- 2Moleculesfalse
- 3Protonsfalse
- 4Compoundstrue
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Answer : 4. "Compounds"
Explanation :
1. According to Dalton's atomic theory, atoms combine in small whole-number proportions to form compounds.