Physics Practice Question and Answer
8 Q: Instrument for measuring blueness of the sky or ocean is called ___________.
1697 062de73c2313eb40eb89fd06b
62de73c2313eb40eb89fd06b- 1Bathymeterfalse
- 2Ceraunographfalse
- 3Cyanometertrue
- 4Barometerfalse
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Answer : 3. "Cyanometer"
Q: Which of the following is not a unit of time?
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60b4b8fa7cb636175d3d12f6- 1light yeartrue
- 2leap yearfalse
- 3Moon monthfalse
- 4None of thesefalse
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Answer : 1. "light year"
Q: If the diameter of the capillary is doubled, then the height of the water surface in it rises-
1686 05f4ca0ae5e74bc4ee54e4187
5f4ca0ae5e74bc4ee54e4187- 1Doublesfalse
- 2It remains halftrue
- 3Not changedfalse
- 4Becomes zerofalse
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Answer : 2. "It remains half"
Q: Mechanical energy is the sum of potential energy and ______ energy.
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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: When water is heated from 0°C to 4°C, its volume:
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5ee0cf998c4c964f73d9946e- 1first increases then decreasesfalse
- 2remains the samefalse
- 3increasesfalse
- 4decreasestrue
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Answer : 4. "decreases"
Q: What happens to the speed of a cycle when it travels on a rough surface?
1683 05ee88a3679b5ea388bed4575
5ee88a3679b5ea388bed4575- 1Increasesfalse
- 2Decreasestrue
- 3Remains the samefalse
- 4None of thesefalse
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Answer : 2. "Decreases"
Q: Principle of fuse is –
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5f1550ae4cff381d16263083- 1Heating effect of electricitytrue
- 2Magnetic effect of electricityfalse
- 3Chemical effect of electricityfalse
- 4Mechanical effect of electricityfalse
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Answer : 1. "Heating effect of electricity "
Q: If the kinetic energy of a satellite is halved, its orbital radius becomes _____
1681 063c7b9788731ac33279af158
63c7b9788731ac33279af158- 1½ timestrue
- 22 timesfalse
- 34 timesfalse
- 4Infinityfalse
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Answer : 1. "½ times"
Explanation :
radius of its orbit will become half.