Physics Practice Question and Answer
8 4 Q:
63c8f650be373f6c954abbda Answer : 1. "It is halved"
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63c8d853b338bc336f0c3de7 4 Q:
5f869be0b7ad805e26c0af01 4 Q:
6062c4148278fd4419261ced 4 Q:
5f6da417ff25c92a085bb0d5 4 Q:
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62f32fca39a8157d97fb6e35
Q: The observer hears a sound from the source which is moving away from the observer who is stationary. Determine the frequency of the sound
1390 063c8f650be373f6c954abbda
63c8f650be373f6c954abbda- 1It is halvedtrue
- 2It remains the samefalse
- 3It reaches infinityfalse
- 4It gets doubledfalse
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Answer : 1. "It is halved"
Explanation :
If the observer is moving away from the source ((Figure)), the observed frequency can be found: λs=vTo−voTovTs=(v−vo)Tov(1fs)=(v−vo)(1fo)fo=fs(v−vov).
Q: Which of the following is renewable energy?
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60b4b2a67cb636175d3d0592- 1Coalfalse
- 2Solar energytrue
- 3Natural Gasfalse
- 4Petrolfalse
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Answer : 2. "Solar energy"
Q: Consider copper and aluminum wire whose length and resistance are the same. Also, the specific resistance of aluminum is more than copper. Select the correct statement
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63c8d853b338bc336f0c3de7- 1Copper and aluminum mass are the samefalse
- 2Copper wire has more mass than the aluminum wirefalse
- 3Copper wire has less mass than the aluminum wirefalse
- 4The information given is incompletetrue
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Answer : 4. "The information given is incomplete "
Q: How is 'Power’ interpreted?
1388 05f869be0b7ad805e26c0af01
5f869be0b7ad805e26c0af01- 1Work done in energy transferfalse
- 2Working rate or energy transfer ratetrue
- 3Work done in a minutefalse
- 4Force applied to increase the loadfalse
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Answer : 2. "Working rate or energy transfer rate "
Q: Pressure inside a soap bubble is-
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6062c4148278fd4419261ced- 1More than atmospheric pressuretrue
- 2Less than atmospheric pressurefalse
- 3Equal to atmospheric pressurefalse
- 4Half of atmospheric pressure/false
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Answer : 1. "More than atmospheric pressure"
Q: According to the law of reflection of light -
1386 05f6da417ff25c92a085bb0d5
5f6da417ff25c92a085bb0d5- 1The angle of incidence is greater than the angle of reflectionfalse
- 2The angle of incidence is equal to the angle of reflectiontrue
- 3The angle of incidence is smaller than the angle of reflectionfalse
- 4All the statements are truefalse
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Answer : 2. "The angle of incidence is equal to the angle of reflection"
Q: Weighing 1 kilogram is the weight.
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61655de87d6182610f5d76ff- 11 Nfalse
- 210 Nfalse
- 39.8 Ntrue
- 49 Nfalse
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Answer : 3. "9.8 N "
Q: Which of the following elements has lowest melting point?
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62f32fca39a8157d97fb6e35- 1Titaniumtrue
- 2Sulphurfalse
- 3Argonfalse
- 4Zincfalse
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Answer : 1. "Titanium"
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