Physics Practice Question and Answer
8 Q: Most waves used for communication purposes rely on geostationary satellites because _____
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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.
Q: What does pupil come in bright light?
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5fe423549f9e9d787c92d003- 1bigfalse
- 2smalltrue
- 3No changefalse
- 4None of thesefalse
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Answer : 2. "small"
Q: What type of energy is used to perform bodily functions?
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60b4b0f6517f2874d53f51b2- 1electric energyfalse
- 2Solar energyfalse
- 3muscle energytrue
- 4Chemical energyfalse
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Answer : 3. "muscle energy"
Q: The sum of the change in kinetic and potential energy is always-
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608929c2fd171c780883f502- 1Zerotrue
- 2Positivefalse
- 3Negativefalse
- 4None of the abovefalse
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Answer : 1. "Zero "
Q: Who is considered as the ultimate source of all forms of energy?
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60b4b23cc6545e407514f717- 1Coalfalse
- 2Atomfalse
- 3Waterfalse
- 4Suntrue
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Answer : 4. "Sun"
Q: Consider an inductor whose linear dimensions are tripled and the total number of turns per unit length is kept constant, what happens to the self-inductance?
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63c8df46bdbddb32fda053ad- 19 timesfalse
- 23 timestrue
- 327 timesfalse
- 41/3 timesfalse
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Answer : 2. "3 times "
Q: Degree of dissociation does not depend on which of the following factors?
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63c7cd09b338bc336f093b86- 1Nature of the solutefalse
- 2Nature of the solventfalse
- 3Soundtrue
- 4Concentrationfalse
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Answer : 3. "Sound "
Explanation :
The Degree of dissociation does not depend on catalyst.The equivalent conductivity of 0.1M weak acid is 100 times less than that at infinite dilution.
Q: What is the nature of real reflection?
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5f6da372f9079a64e3c04432- 1Reversetrue
- 2straightfalse
- 3upright and upside downfalse
- 4None of thesefalse
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