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If the earth lost 99% of its mass, the escape velocity would _____
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Oct 4, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
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Consider 2 satellites A and B having time periods 16 hours and 1 hour, respectively. What is the ratio of the radius of their orbits?
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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A geostationary satellite is orbiting the earth at a height of 4R above the earth’s surface. The time period of another satellite at a height of 2R is _____
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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A polar orbit is ideal for a spy satellite.
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Stress, like pressure, is always perpendicular to a plane. True or False?
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Which of the following statements is correct for brittle materials.
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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In a closed pipe of radius R, fluid (having some viscosity) is flowing laminarly. Which point along a cross section will have maximum speed?
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Oct 4, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
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1
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What is the slope of line drawn for a graph between temperature in °C & °F?
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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A rod is lying on the ground with both ends free. It has a length of 1m. Coefficient of linear expansion equal to 1.1*10^-5per °C. Calculate the strain when the change in temperature is 10K.
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Oct 4, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
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1
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Change of phase occurs at a constant temperature, which implies that even on addition of heat to a substance temperature remains constant. True or False?
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Oct 4, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
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1
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Getting burnt by steam is less dangerous than boiling water. True or False?
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Oct 4, 2021
in
Class-XI-PHYSICS
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Sandeepthukran
cbse
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1
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Two spheres, A & B, are made up of the same material. The radius of A is twice that of B, while the temperature of A is half that of B. What is their ratio of energy emitted per unit time (EA : EB)?
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Oct 4, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
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The variables like pressure, volume, temperature of a thermodynamic system are microscopic. True or False?
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Oct 4, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
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1
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Select the correct statement.
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Oct 4, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
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1
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Which law of thermodynamics says that efficiency of a heat engine cannot be 1?
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Oct 4, 2021
in
Class-XI-PHYSICS
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Sandeepthukran
cbse
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What is a quasi-static process?
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
physics
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Let T1 be the time period of a single spring mass system on a horizontal surface. Let T2 be the time period of the same system when hung from the ceiling. What is the expression for T1 & T2?
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Oct 4, 2021
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Class-XI-PHYSICS
by
Sandeepthukran
cbse
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A spring mass system is hanging from the ceiling of a lift. It has been like this for quite some time. Suddenly the cables holding the lift are cut.
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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A function has the equation Acos3t + Bsin3t. Find the value of time period.
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Oct 4, 2021
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Class-XI-PHYSICS
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Sandeepthukran
cbse
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Consider the damped SHM of a spring mass system. If the time taken for the amplitude to become half is ‘T’, what is the time taken for mechanical energy to become half?
asked
Oct 3, 2021
in
Class-XI-PHYSICS
by
Sandeepthukran
cbse
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