Physics Practice Question and Answer
8 Q: What are the conditions for gas like Carbon monoxide to obey the ideal gas laws?
1024 063c8f745bdbddb32fda0e8d0
63c8f745bdbddb32fda0e8d0- 1Low temperature and low pressurefalse
- 2Low temperature and high pressurefalse
- 3High temperature and low pressuretrue
- 4High temperature and high pressurefalse
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Answer : 3. "High temperature and low pressure "
Explanation :
A real gas can behave as an ideal gas if volume of molecule is negligible and interaction between molecule is negligible. This will happen if number of molecule per unit volume is very small. This is only possible at high temperature and low pressure.
Q: Is the image formed by a plane mirror always?
1023 05f6da46aec13dd748004ce67
5f6da46aec13dd748004ce67- 1virtual and vice versafalse
- 2Real and directfalse
- 3direct and virtualtrue
- 4Actualfalse
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Answer : 3. "direct and virtual"
Q: Match the columns.
Column - A Column-B
I. Electric current a. Henry
II. Potential difference b. Farad
III. Gapacitance c. Volt
IV. inductance d. Ampere
1022 0649a9c63dad6f2e01f6df4c3
649a9c63dad6f2e01f6df4c3- 1i-a, ii-b, iii-c, iv-dfalse
- 2i-b, ii-a, iii-c, iv-dfalse
- 3i-d, ii-c, iii-b, iv-atrue
- 4i-a, ii-c, iii-b, iv-dfalse
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Answer : 3. "i-d, ii-c, iii-b, iv-a"
Explanation :
The columns are a correct match.
I. Electric current - Ampere
II. Potential difference - c. Volt
III. Gapacitance - b. Farad
IV. inductance - a. Henryd.
Q: The principle on which optical fiber works is
1017 05f746ec3a921aa16e68c3704
5f746ec3a921aa16e68c3704- 1Full internal reflectiontrue
- 2Refractionfalse
- 3Scatteringfalse
- 4Deviationfalse
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Answer : 1. "Full internal reflection"
Q: When ray of light goes from denser to rarer medium then it –
1012 06062c4df9cf7d827dcdcfcd2
6062c4df9cf7d827dcdcfcd2- 1Bends towards the normalfalse
- 2Bends away from the normaltrue
- 3Goes Straightfalse
- 4Reflected backfalse
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Answer : 2. "Bends away from the normal "
Q: What is the unit of the physical quantity "Inductance"?
1006 062e9fd23ceafbe581b747c99
62e9fd23ceafbe581b747c99- 1weberfalse
- 2faradfalse
- 3henrytrue
- 4teslafalse
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Answer : 3. "henry"
Q: The device for generating current is called?
1005 05fe41bea438750744e325552
5fe41bea438750744e325552- 1ammeterfalse
- 2Galvanometerfalse
- 3generatortrue
- 4meterfalse
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Answer : 3. "generator"
Q: The observer hears a sound from the source which is moving away from the observer who is stationary. Determine the frequency of the sound
1004 063c8f650be373f6c954abbda
63c8f650be373f6c954abbda- 1It is halvedtrue
- 2It remains the samefalse
- 3It reaches infinityfalse
- 4It gets doubledfalse
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Answer : 1. "It is halved"
Explanation :
If the observer is moving away from the source ((Figure)), the observed frequency can be found: λs=vTo−voTovTs=(v−vo)Tov(1fs)=(v−vo)(1fo)fo=fs(v−vov).