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: The device for generating current is called?
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5fe41bea438750744e325552- 1ammeterfalse
- 2Galvanometerfalse
- 3generatortrue
- 4meterfalse
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Answer : 3. "generator"
Q: Which one of the following common devices works on the basis of the principle of mutual induction?
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609399ea402c5862950ea190- 1Tubelightfalse
- 2Transformertrue
- 3Photodiodefalse
- 4LEDfalse
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Answer : 2. "Transformer"
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: Which is the force due to which the body is pulled towards the center of the earth?
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5f8fcee93ca2d767b181e989- 1Gravitational forcetrue
- 2Massfalse
- 3Momentumfalse
- 4impulsive forcefalse
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Answer : 1. "Gravitational force "
Q: What is the kilowatt hour unit?
1210 05fe46a8500c5087b4d137b22
5fe46a8500c5087b4d137b22- 1charge powerfalse
- 2Energytrue
- 3Potential powerfalse
- 4powerfalse
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Answer : 2. "Energy"
Q: The velocity of light in vacuum or air is
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61655d803ee3b5612c8e183f- 1$$3 x 10^8$$ m / sec .true
- 2$$2 x 10^4$$ m / sec .false
- 3$$9 x 10^2$$ m / sec .false
- 4$$3 x 10^11$$ m / sec .false
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Answer : 1. "$$3 x 10^8$$ m / sec . "
Q: When ray of light goes from denser to rarer medium then it –
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6062c4df9cf7d827dcdcfcd2- 1Bends towards the normalfalse
- 2Bends away from the normaltrue
- 3Goes Straightfalse
- 4Reflected backfalse
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