Physics Practice Question and Answer
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Q: A typical example of a semiconductor is _______?
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5fe1bcbb4c864b4aa0de4b47- 1Platinumfalse
- 2Germaniumtrue
- 3Quartzfalse
- 4Micafalse
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Answer : 2. "Germanium"
Q: Atomic bomb theory is based on-
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5fa55f0566bdb73670f4420c- 1on nuclear fusionfalse
- 2On nuclear fissiontrue
- 3Both of the abovefalse
- 4None of the abovefalse
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Answer : 2. "On nuclear fission"
Q: When a body falls from an aeroplane, there is increase in its
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5fa55e513c64cb3fb8d7a766- 1Potential energyfalse
- 2Kinetic energytrue
- 3Massfalse
- 4Accelerationfalse
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Answer : 2. "Kinetic energy"
Q: Household appliances based on thermal effect of electric current is-
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5f8fecaa9e18f97b703a48b3- 1Electric heaterfalse
- 2Electric bulbfalse
- 3Tubelightfalse
- 4All of the abovetrue
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Answer : 4. "All of the above"
Q: Kilowatt hour (KWH) unit is-
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5f8febf07793eb35d727143c- 1Energytrue
- 2Powerfalse
- 3Electric chargefalse
- 4Electrical currentfalse
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Answer : 1. "Energy "
Q: The length of a wire is L m. The length of the wire is pulled to 2L meters, now the resistance of the wire will be.
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5f8feb8e7793eb35d72711b1- 1double the earlierfalse
- 2First four timestrue
- 3One fourth of firstfalse
- 4will remain unchangedfalse
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Answer : 2. "First four times "
Q: Which of the following statements is not correct?
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5f8fd438c380c466d4dd1840- 1The velocity of sound in air increases as the temperature increases.false
- 2The velocity of sound in air does not depend on pressure.false
- 3The velocity of sound in air decreases with the increase of humidity.true
- 4Noise velocity in air is not affected by change in amplitude and frequency.false
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Answer : 3. "The velocity of sound in air decreases with the increase of humidity."
Q: The value of the velocity of sound is the lowest.
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5f8fd0813ca2d767b181f610- 1Solidfalse
- 2Liquidfalse
- 3Gasestrue
- 4All of thesefalse
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Answer : 3. "Gases "
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