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Recent questions tagged Cbse
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Q: A 4kg eagle picks up a 75g snake and raises it 2.5 m from the ground to a branch. What is the work done by the eagle on the snake? (Assume g = 10 m/s^2)
asked
Oct 6, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: The maximum value of gravitational potential energy is zero.
asked
Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
0
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Q: A satellite is seen after every 8 hours. If it rotates opposite to that of the earth, what is its angular velocity about the centre of the earth?
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Oct 6, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: Assume that a satellite executes perfectly circular orbits around a perfectly circular sphere. The work done by the satellite in 1 complete revolution is _____
asked
Oct 6, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: A wire has a cross sectional area ‘A’, length ‘L’ and young’s modulus ‘Y’. It is pulled by a force ‘F’ which causes a total extension of length ‘l’. The force F is so adjusted that the wire is only slowly stretched.
asked
Oct 6, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: Viscosity is said to be internal friction between fluid layers. What type of force is it?
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Oct 6, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: An ice cube is kept on the surface of an aluminium block and another ice cube on the surface of a plastic block. Both blocks have the same temperature. Select the correct statement.
asked
Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Q: Why is mercury used in thermometers?
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Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Q: For a constant volume gas thermometer select the correct statement.
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Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Q: Select the correct statement.
asked
Oct 6, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: The sun emits light having maximum intensity at a wavelength 468nm. Assume emissivity of sun is 1. Calculate its surface temperature. σ= 5.67*10^-8W/m^2K^4.
asked
Oct 6, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: The rate of cooling of water increases with fall in temperature. True or False?
asked
Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Q: A liquid cools from 65°C to 55°C in 5 mins. If the surrounding temperature is 35℃, calculate the time taken for temperature to fall from 45°C to 35°C.
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Oct 6, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
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Q: Which of the following variables is intensive?
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Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Q: What is the coefficient of performance of a refrigerator? Let Q1 be the heat released to hot reservoir, Q2 be the heat extracted from a cold reservoir & W be the work done on the refrigerator.
asked
Oct 6, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
0
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Q: A process is carried out between 2 systems. It is possible for entropy of one system to decrease. True or False?
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Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Q: What is the correct order of steps for a carnot cycle?
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Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Q: What is the number of molecules in 2.24L of SO2 at STP?
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Oct 6, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
0
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Q: A particle is in SHM. When displacement is ‘a‘ potential energy is 8J. When displacement is ‘a‘ potential energy is 18J.
asked
Oct 6, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
+1
vote
Q: A spring block system is on a horizontal surface. The block is compressed by 10cm. What should be the coefficient of friction between the block and ground such that the block comes to a stop at the mean position?
asked
Oct 6, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
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