Physics Questions Practice Question and Answer
8 Q: In which year did Albert Einstein predict a new state of matter, the Bose-Einstein condensate (BEC), based on a quantum formulation by the Indian physicist Satyendra Nath Bose?
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64c38ae6bd3d254806859ebd- 11935false
- 21924true
- 31930false
- 41919false
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Answer : 2. "1924"
Explanation :
1. In which year did Albert Einstein predict a new state of matter, Bose-Einstein condensate (BEC) in 1924, based on the quantum formulation given by Indian physicist Satyendra Nath Bose?
2. Bose–Einstein condensate (BEC) is a state of matter in which a group of boson particles are in the same quantum state.
Q: Which scientist suggested that the magnet must exert an equal and opposite force on the current-carrying conductor?
640 064c24b4aa919c8488e0dbe6a
64c24b4aa919c8488e0dbe6a- 1Michael Faradayfalse
- 2Andre Marie Amperetrue
- 3Joseph Henryfalse
- 4William Gilbertfalse
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Answer : 2. "Andre Marie Ampere "
Explanation :
1. French scientist Andre-Marie Ampère suggested that a magnet should also exert an equal and opposite force on a current-carrying conductor.
2. A current-carrying wire has its own magnetic field.
3. A current-carrying wire attracts a magnetic material like a normal bar magnet.
4. When the current is withdrawn or the switch is closed, there is no magnetic effect in that case.
5. This phenomenon was called the magnetic effect of current.
Q: Identify the correct statement.
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64c24ac166a41f484c177c91- 1The resistance of a wire depends on the length and density of the wire.false
- 2Specific resistance is the same for all conductors.false
- 3Resistance of a wire depends on the length and cross-section of the wire.true
- 4Specific resistance is dependent on the cross-sectional area of the wire.false
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Answer : 3. "Resistance of a wire depends on the length and cross-section of the wire."
Explanation :
1. Resistance of a wire depends on the length and cross-section of the wire.
Q: Mechanical energy is the sum of potential energy and ______ energy.
533 064c22eccd3a6d4481eebda27
64c22eccd3a6d4481eebda27- 1kinetictrue
- 2heatfalse
- 3electricalfalse
- 4chemicalfalse
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Answer : 1. "kinetic"
Explanation :
1. Mechanical energy is a combination of kinetic energy and potential energy.
2. Mechanical energy is defined as the sum of kinetic energy and potential energy used to do work on an object.
3. Mechanical energy is the form of energy that is related to the position and motion of an object.
Q: What is the correct order of radiations in descending order of frequencies?
496 064b52707efb5ba16688213e1
64b52707efb5ba16688213e1- 1Infrared > Microwaves > Radio waves > X-raysfalse
- 2Radio waves > X-rays > Microwaves > Infraredfalse
- 3X-rays > Infrared > Microwaves > Radio wavestrue
- 4Infrared > Microwaves > X-rays > Radio wavesfalse
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Answer : 3. "X-rays > Infrared > Microwaves > Radio waves"
Explanation :
The correct order of radiations is in descending order of frequencies.
X-rays > Infrared > Microwaves > Radio waves
Q: In 1962, who published 'The History of Ocean Basins', which outlined the theory of how tectonic plates could move, later called 'sea floor spreading'?
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64b51c41efb5ba166881e176- 1George Edward Backusfalse
- 2Alfred Wegenerfalse
- 3Louis Bauerfalse
- 4Harry Hammond Hesstrue
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Answer : 4. "Harry Hammond Hess"
Explanation :
1. In 1962, Harry Hammond Hayes published 'The History of Ocean Basins'.
2. In this, the theory of plate tectonics was outlined and which was later also known as 'ocean bottom spreading'.
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?
381 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: Which among the following instruments is used to measure either direct or alternating electric current?
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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.