Physics Questions Practice Question and Answer
8 Q: Creates a smaller image than the object?
1387 05f6da3be5256e8407c2e4412
5f6da3be5256e8407c2e4412- 1convex mirrorfalse
- 2concave mirrorfalse
- 3plane mirrorfalse
- 4Convex mirror and concave mirrortrue
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Answer : 4. "Convex mirror and concave mirror"
Q: The measure of inductance is
1384 161655ebe3d260361529b137f
61655ebe3d260361529b137f- 1Henrytrue
- 2Ohmfalse
- 3Amperefalse
- 4Coulombfalse
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Answer : 1. "Henry "
Q: The coefficient performance of a refrigerator is 5. If the temperature inside the freezer is -20℃, calculate the heat rejected to the surrounding
1381 063c921551e8e3f3e1a3a5a0a
63c921551e8e3f3e1a3a5a0a- 1110Ctrue
- 2false
410C
- 3false
210C
- 4false
310C
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Answer : 1. "110C"
Explanation :
A heat pump is a heat engine working in reverse direction. A refrigerator is basically a heat pump, which is used to pump heat (absorbed from materials at lower temperatures inside the refrigerator) to the surroundings at higher temperatures. The coefficient of performance of a refrigerator is defined as the ratio of heat removed
Why
2
Energy from inside the refrigerator per cycle
w
given per cycle for heat removal,
α
,
Why
2
,
w
,
Q: Refraction of light is responsible for:
1380 06189e5479236c01fbea82faa
6189e5479236c01fbea82faa- 1Shadow formationfalse
- 2Twinkling of starstrue
- 3Blue color of the skyfalse
- 4Rainbowfalse
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Answer : 2. "Twinkling of stars"
Q: The unit of work is
1376 160b4b816f2c446136b8b757d
60b4b816f2c446136b8b757d- 1Wattsfalse
- 2Jouletrue
- 3Newtonfalse
- 4amperefalse
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Answer : 2. "Joule"
Q: When resistors are connected in series, then net resistance____.
1375 26099137c1c52c418ae4c60eb
6099137c1c52c418ae4c60eb- 1Increasestrue
- 2Decreasesfalse
- 3Remains samefalse
- 4None of thesefalse
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Answer : 1. "Increases "
Q: Pressure is measured in terms of
1373 06066cbdb2b4b7e646bfc893a
6066cbdb2b4b7e646bfc893a- 1Mass and Densityfalse
- 2Work donefalse
- 3Force and Areatrue
- 4Force and Distancefalse
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Answer : 3. "Force and Area"
Q: Who gave the theory of gravity?
1371 061655b5c3d260361529b0876
61655b5c3d260361529b0876- 1Isaac Newtontrue
- 2John Adamsfalse
- 3Charles Newtonfalse
- 4Charles Babbagefalse
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