Physics Questions Practice Question and Answer
8 Q: Which of the following is the best conductor of heat?
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616559a93d260361529affd0- 1Leatherfalse
- 2Benzenefalse
- 3Mercurytrue
- 4Waterfalse
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Answer : 3. "Mercury "
Q: Choose the correct statement
587 063c910807efeed32fc20e26c
63c910807efeed32fc20e26c- 1A body can be accelerated by frictional forcefalse
- 2There can be zero frictionfalse
- 3Kinetic friction is greater than rolling frictiontrue
- 4Frictional force and area of contact between the two surfaces are proportionalfalse
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Answer : 3. "Kinetic friction is greater than rolling friction "
Q: What is the direction of torque?
580 062ce884231b6d20155334fe4
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: In which year did Albert Einstein predict a new state of matter, the Bose-Einstein condensate (BEC), based on a quantum formulation by the Indian physicist Satyendra Nath Bose?
560 064c38ae6bd3d254806859ebd
64c38ae6bd3d254806859ebd- 11935false
- 21924true
- 31930false
- 41919false
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Answer : 2. "1924"
Explanation :
1. In which year did Albert Einstein predict a new state of matter, Bose-Einstein condensate (BEC) in 1924, based on the quantum formulation given by Indian physicist Satyendra Nath Bose?
2. Bose–Einstein condensate (BEC) is a state of matter in which a group of boson particles are in the same quantum state.
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?
554 063c8df46bdbddb32fda053ad
63c8df46bdbddb32fda053ad- 19 timesfalse
- 23 timestrue
- 327 timesfalse
- 41/3 timesfalse
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Answer : 2. "3 times "
Q: Identify the correct statement.
546 164c24ac166a41f484c177c91
64c24ac166a41f484c177c91- 1The resistance of a wire depends on the length and density of the wire.false
- 2Specific resistance is the same for all conductors.false
- 3Resistance of a wire depends on the length and cross-section of the wire.true
- 4Specific resistance is dependent on the cross-sectional area of the wire.false
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Answer : 3. "Resistance of a wire depends on the length and cross-section of the wire."
Explanation :
1. Resistance of a wire depends on the length and cross-section of the wire.
Q: A potentiometer is considered a versatile and accurate device to make an electrical measurement of EMF. Why?
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63c8d7f2bdbddb32fda0219d- 1Because the method involves a combinationfalse
- 2There are cells involvedfalse
- 3Because of potential gradientsfalse
- 4As there is no flow of current through the galvanometertrue
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Answer : 4. "As there is no flow of current through the galvanometer"
Explanation :
A potentiometer is an accurate and versatile device to make electrical measurements of emf because the method involves a condition of no current flow through the galvanometer, the device can be used to measure potential difference, internal resistance of a cell and compare emf's of two sources. Q.
Q: Match the columns.
Column - A Column-B
I. Electric current a. Henry
II. Potential difference b. Farad
III. Gapacitance c. Volt
IV. inductance d. Ampere
540 0649a9c63dad6f2e01f6df4c3
649a9c63dad6f2e01f6df4c3- 1i-a, ii-b, iii-c, iv-dfalse
- 2i-b, ii-a, iii-c, iv-dfalse
- 3i-d, ii-c, iii-b, iv-atrue
- 4i-a, ii-c, iii-b, iv-dfalse
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Answer : 3. "i-d, ii-c, iii-b, iv-a"
Explanation :
The columns are a correct match.
I. Electric current - Ampere
II. Potential difference - c. Volt
III. Gapacitance - b. Farad
IV. inductance - a. Henryd.