Physics Practice Question and Answer
8 Q: What is the color that is used in danger signals?
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5fe46a3d57a5647868b6522c- 1Yellow colorfalse
- 2Purple colorfalse
- 3Blue colorfalse
- 4Red colortrue
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Answer : 4. "Red color"
Q: What is the refractive index of diamond?
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5f6da978f9079a64e3c0a995- 11.77false
- 21.47false
- 31.44false
- 42.42true
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Answer : 4. "2.42"
Q: When resistors are connected in series, then net resistance____.
1478 26099137c1c52c418ae4c60eb
6099137c1c52c418ae4c60eb- 1Increasestrue
- 2Decreasesfalse
- 3Remains samefalse
- 4None of thesefalse
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Answer : 1. "Increases "
Q: A 1 kg object is dropped from a height of 30 meters to the ground. The work done by the force of gravity will be
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5f86a39bb7ad805e26c16cb0- 130 Jfalse
- 210 Jfalse
- 30.33 Jfalse
- 4300 Jtrue
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Answer : 4. "300 J"
Q: Parsec is a unit?
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60b4b8b37cb636175d3d11e2- 1massfalse
- 2magnetic forcefalse
- 3Timefalse
- 4Distancetrue
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Answer : 4. "Distance"
Q: The unit of which physical quantity is not pascal?
1470 0605c55f33af5ff63fd6b4361
605c55f33af5ff63fd6b4361- 1Moment of inertiatrue
- 2Pressurefalse
- 3Stressfalse
- 4Young’s modulusfalse
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Answer : 1. "Moment of inertia"
Q: Which of the following quantities is not a vector?
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613740ba3ee2bf25f512fd0b- 1Velocityfalse
- 2Volumetrue
- 3Displacementfalse
- 4forcefalse
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Answer : 2. "Volume"
Q: A potentiometer is considered a versatile and accurate device to make an electrical measurement of EMF. Why?
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63c8d7f2bdbddb32fda0219d- 1Because the method involves a combinationfalse
- 2There are cells involvedfalse
- 3Because of potential gradientsfalse
- 4As there is no flow of current through the galvanometertrue
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Answer : 4. "As there is no flow of current through the galvanometer"
Explanation :
A potentiometer is an accurate and versatile device to make electrical measurements of emf because the method involves a condition of no current flow through the galvanometer, the device can be used to measure potential difference, internal resistance of a cell and compare emf's of two sources. Q.