Physics Questions Practice Question and Answer
8 Q: What is the nature of real reflection?
1401 05f6da372f9079a64e3c04432
5f6da372f9079a64e3c04432- 1Reversetrue
- 2straightfalse
- 3upright and upside downfalse
- 4None of thesefalse
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Answer : 1. "Reverse"
Q: When ray of light goes from denser to rarer medium then it –
1399 06062c4df9cf7d827dcdcfcd2
6062c4df9cf7d827dcdcfcd2- 1Bends towards the normalfalse
- 2Bends away from the normaltrue
- 3Goes Straightfalse
- 4Reflected backfalse
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Answer : 2. "Bends away from the normal "
Q: The sum of the change in kinetic and potential energy is always-
1390 0608929c2fd171c780883f502
608929c2fd171c780883f502- 1Zerotrue
- 2Positivefalse
- 3Negativefalse
- 4None of the abovefalse
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Answer : 1. "Zero "
Q: Which of the following elements has the largest atomic radii?
1387 06419aed45bff3d098df69c79
6419aed45bff3d098df69c79- 1Berylliumfalse
- 2Lithiumtrue
- 3Nitrogenfalse
- 4Carbonfalse
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Answer : 2. "Lithium"
Explanation :
Francium (Fr) has the highest atomic radius in the periodic table. It belongs to the alkali metals group. Its atomic number is 87. The periodic trend of atomic radius suggests that the atomic radius usually decreases along a period (left to right) and increases down a group (top to bottom).
Q: The amount of work done in moving a charge of 4C across two points having a potential difference of 6V is ______.
1387 0641974a1b34a0b67fcf4a8bf
641974a1b34a0b67fcf4a8bf- 148 Jfalse
- 212 Jfalse
- 336 Jfalse
- 424 Jtrue
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Answer : 4. "24 J"
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?
1386 063c8df46bdbddb32fda053ad
63c8df46bdbddb32fda053ad- 19 timesfalse
- 23 timestrue
- 327 timesfalse
- 41/3 timesfalse
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Answer : 2. "3 times "
Q: What is the constant of proportionality of an oscillator if the damping force is directly proportional to the velocity
1373 063c8e053bdbddb32fda05b2a
63c8e053bdbddb32fda05b2a- 1Kg.s-1true
- 2Kg.m.s-1false
- 3Kg.sfalse
- 4Kg.m.s-2false
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Answer : 1. "Kg.s-1"
Explanation :
The damping force of an oscillating particle is observed to be proportional to velocity. The constant of proportionality can be measured in. kgs−1.
Q: A 40kVA transformer has core loss of 400 W & full load copper loss of 800 W. The proportion of full load at maximum efficiency is -
1370 06304af8620c0656a1d925419
6304af8620c0656a1d925419- 150%false
- 262.3%false
- 370.7%true
- 4100%false
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