Physics Questions Practice Question and Answer
8 Q: If the kinetic energy of a satellite is halved, its orbital radius becomes _____
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63c7b9788731ac33279af158- 1½ timestrue
- 22 timesfalse
- 34 timesfalse
- 4Infinityfalse
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Answer : 1. "½ times"
Explanation :
radius of its orbit will become half.
Q: What is the capacity of a convex lens?
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5f6da679ec13dd748004e02b- 1negativefalse
- 2positivetrue
- 3zerofalse
- 4Othersfalse
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Answer : 2. "positive"
Q: The product of force and displacement is called—
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5f86a302b7ad805e26c163d8- 1Accelerationfalse
- 2Worktrue
- 3Momentumfalse
- 4Weightfalse
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Answer : 2. "Work"
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: Polar satellites are used for high-resolution imaging of the earth’s surface because _____
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63c7c166bd6d9033208efbdf- 1They have better camerasfalse
- 2They are very high above the surface of the earth and travel slowly to gather more informationfalse
- 3They are closer to the surface of the earth and can cover vast areas very quicklytrue
- 4They can be launched by most countries in the worldfalse
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Answer : 3. "They are closer to the surface of the earth and can cover vast areas very quickly"
Explanation :
Explanation: Since polar satellites orbit close to the surface of the earth, it is easier to click images of the planet's surface with greater detail. Their high orbital velocity enables them to view most of the surface strip-by-stip very quickly with which high-resolution images can be constructed.
Q: What happens to the speed of a cycle when it travels on a rough surface?
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5ee88a3679b5ea388bed4575- 1Increasesfalse
- 2Decreasestrue
- 3Remains the samefalse
- 4None of thesefalse
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Answer : 2. "Decreases"
Q: Transformers are used
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5f72ea92a921aa16e6825ed6- 1To convert AC into DCfalse
- 2To convert DC to ACfalse
- 3To detect DC voltagefalse
- 4To oxidation or reduce AC voltagetrue
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Answer : 4. "To oxidation or reduce AC voltage"
Q: If the diameter of the capillary is doubled, then the height of the water surface in it rises-
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5f4ca0ae5e74bc4ee54e4187- 1Doublesfalse
- 2It remains halftrue
- 3Not changedfalse
- 4Becomes zerofalse
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