Physics Practice Question and Answer
8 Q: What is the nature of real reflection?
796 05f6da372f9079a64e3c04432
5f6da372f9079a64e3c04432- 1Reversetrue
- 2straightfalse
- 3upright and upside downfalse
- 4None of thesefalse
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Answer : 1. "Reverse"
Q: What is the degree of dissociation for strong electrolytes?
791 063c7ccbc8731ac33279b21f7
63c7ccbc8731ac33279b21f7- 11true
- 20false
- 3Less than 1false
- 4Greater than 1false
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Answer : 1. "1"
Explanation :
Strong electrolytes have a degree of dissociation close to one, while weak electrolytes have a degree of dissociation less than one. Solvent nature: Solvents with a high dielectric constant show more dissociation. Dilution: As the solution is diluted, the degree of dissociation increases.
Q: Most waves used for communication purposes rely on geostationary satellites because _____
786 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.
Q: What is the direction of torque?
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62ce884231b6d20155334fe4- 1Opposite to the direction of applied forcefalse
- 2Parallel to the radiusfalse
- 3Perpendicular to the direction of applied forcetrue
- 4Same as the direction of applied forcefalse
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Answer : 3. "Perpendicular to the direction of applied force"
Q: Which of the following is correct about uniform acceleration?
770 064a2adc98dcbe3218b096682
64a2adc98dcbe3218b096682- 1An object moving on friction-less surface can gain uniform acceleration.false
- 2An object under free fall is an example of uniform acceleration.true
- 3An object moving with constant speed is an example of uniform acceleration.false
- 4Motion of a spring is an example of uniform acceleration.false
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Answer : 2. "An object under free fall is an example of uniform acceleration."
Explanation :
1. The change in velocity of an object at equal time intervals is called uniform acceleration.
2. A freely falling object is an example of uniform acceleration.
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?
761 063c8df46bdbddb32fda053ad
63c8df46bdbddb32fda053ad- 19 timesfalse
- 23 timestrue
- 327 timesfalse
- 41/3 timesfalse
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Answer : 2. "3 times "
Q: What are the conditions for gas like Carbon monoxide to obey the ideal gas laws?
756 063c8f745bdbddb32fda0e8d0
63c8f745bdbddb32fda0e8d0- 1Low temperature and low pressurefalse
- 2Low temperature and high pressurefalse
- 3High temperature and low pressuretrue
- 4High temperature and high pressurefalse
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Answer : 3. "High temperature and low pressure "
Explanation :
A real gas can behave as an ideal gas if volume of molecule is negligible and interaction between molecule is negligible. This will happen if number of molecule per unit volume is very small. This is only possible at high temperature and low pressure.
Q: Degree of dissociation does not depend on which of the following factors?
747 063c7cd09b338bc336f093b86
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.