Physics Practice Question and Answer
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64c24ac166a41f484c177c91 Answer : 3. "Resistance of a wire depends on the length and cross-section of the wire."
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Q: On increasing the pressure on ice, what will be its melting point?
1808 0613745b85ee3b079c605e1e7
613745b85ee3b079c605e1e7- 1decreasetrue
- 2increasefalse
- 3become zerofalse
- 4remain unchangedfalse
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Answer : 1. "decrease"
Q: In what units can we measure food energy?
1799 160b4bda0c6545e40751521af
60b4bda0c6545e40751521af- 1Joulefalse
- 2caloriestrue
- 3Argfalse
- 4None of thesefalse
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Answer : 2. "calories"
Q: Which among the following is a vector quantity?
1783 05f43691b09e4377de92ed2c6
5f43691b09e4377de92ed2c6- 1Heatfalse
- 2Workfalse
- 3Angular momentumtrue
- 4Timefalse
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Answer : 3. "Angular momentum "
Q: The shortest unit of length is:
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61655af33d260361529b0632- 1Angstromsfalse
- 2Fermi metertrue
- 3Micronfalse
- 4Nanometerfalse
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Answer : 2. "Fermi meter "
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: If the resistance of a conductor is doubled , the current gets halved. This is because:
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5ef58969d7fe8173219c639a- 1I=V-Rfalse
- 2$$ I={v\over R}$$true
- 3I=VRfalse
- 4$$ I={R\over V}n$$false
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Answer : 2. "$$ I={v\over R}$$"
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: What is the Newton / kg unit?
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5eec7bfe1dab100936f0ce9e- 1velocityfalse
- 2Gravitational potentialfalse
- 3forcefalse
- 4accelerationtrue
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Answer : 4. "acceleration"
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