Physics Practice Question and Answer
8 Q: The power of a lens is -2.0 D. Here ‘D’ stands for ________.
980 060ffbd12d984302df240ac39
60ffbd12d984302df240ac39- 1distancefalse
- 2dilationfalse
- 3dioptretrue
- 4degreefalse
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Answer : 3. "dioptre"
Q: In case of negative work the angle between the force and displacement is-
979 060892b3c0ac1df7d9f80ef4b
60892b3c0ac1df7d9f80ef4b- 10°false
- 245°false
- 390°false
- 4180°true
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Answer : 4. "180°"
Q: Which of the following elements has lowest melting point?
977 162f32fca39a8157d97fb6e35
62f32fca39a8157d97fb6e35- 1Titaniumtrue
- 2Sulphurfalse
- 3Argonfalse
- 4Zincfalse
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Answer : 1. "Titanium"
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
972 063c8d853b338bc336f0c3de7
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: What type of current is obtained from dynamo?
967 05fe45b9a00c5087b4d132da3
5fe45b9a00c5087b4d132da3- 1Direct Sectiontrue
- 2alternating currentfalse
- 3both streamsfalse
- 4None of thesefalse
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Answer : 1. "Direct Section"
Q: For an object experiencing weightlessness _____
962 063c7a79dbdbddb32fd9ccd6a
63c7a79dbdbddb32fd9ccd6a- 1its weight force is non-zerofalse
- 2it has inertiatrue
- 3it experiences a value of acceleration greater than the acceleration due to gravityfalse
- 4it experiences a value of acceleration lesser than the acceleration due to gravityfalse
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Answer : 2. "it has inertia"
Q: Planetary scientists call the thin gaseous envelope around the Moon as the _______.
957 062bece2d1d322d793f53ca68
62bece2d1d322d793f53ca68- 1lunar stratospherefalse
- 2lunar exospheretrue
- 3lunar endospherefalse
- 4lunar thermospherefalse
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Answer : 2. "lunar exosphere "
Q: Most waves used for communication purposes rely on geostationary satellites because _____
954 063c7baad1c47ef334bdd8984
63c7baad1c47ef334bdd8984- 1They cannot transmit data at long distances due to curvature of the earthtrue
- 2They are reflected by the atmospherefalse
- 3They are very cheapfalse
- 4It does not occupy space on the earth’s surfacefalse
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Answer : 1. "They cannot transmit data at long distances due to curvature of the earth"
Explanation :
Explanation: Most communication waves cannot transmit data accurately over long distances due to the curvature of the earth. They can only do so in the line of sight. However, they are not reflected by the ionosphere like radio waves and can be relayed to a wide area using geostationary satellites.