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Recent questions in Class-XI-PHYSICS
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What happens to the energy of a particle, in SHM, with time in the presence of damping forces?
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Oct 3, 2021
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AdilsonLima
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What does the given equation: x = Asin(ky+wt+a) represent?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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The gravitational potential energy of a body at a distance “r” from the centre of the earth is V. Its weight at a distance “2r” from the centre of the earth is _____
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
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The velocity with which an object should be projected from the surface of the earth such that it reaches a maximum height equal to “n” time the radius of earth “R” is _____
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Oct 3, 2021
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Class-XI-PHYSICS
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cbse
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The value ofthe gravitational field in a region is given by g = 2i + 3j. What is the change in gravitational potential energy of a particle of mass 5kg when it is taken from the origin O(0,0) to a point P(10, -5)?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
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The satellites orbiting the earth, eventually fall to the earth when they are left unsupervised or unattended because _____
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Two satellites of masses 50 kg and 100 kg revolve around the earth in circular orbits of radii 9R and 16R. What is the ratio of speeds of the two satellites?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Most waves used for communication purposes rely on geostationary satellites because _____
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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A geostationary satellite seems to be fixed in the sky because it does not orbit the earth.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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A geosynchronous satellite always appears fixed in the sky.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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A completely elastic solid body partially regains its shape after removal of external force. True or False?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Stress in a solid body is defined as ___________ per unit area.
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Oct 3, 2021
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Class-XI-PHYSICS
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cbse
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Temperature is absolute. True or False?
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Oct 3, 2021
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AdilsonLima
cbse
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At a given temperature a body emits energy of a single wavelength corresponding to that temperature. True or False?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Two bodies in thermal equilibrium can have different pressures. True or False?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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A block of mass 1kg is given a velocity of 5m/s on a horizontal flat surface. What will be the change in internal energy of the block-surface system,
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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The behavior of real gases approaches that of ideal gas in which of these following conditions?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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What is the ratio of densities of 2 gases, O2 & N2, having partial pressures in the ratio 2:3?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Boyle’s law can be deduced from kinetic theory. True or False?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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What is the ratio of specific heats for a monatomic gas?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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1
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In an SHM the time taken to go from mean position to A/2 is the same as that from A/2 to A. True or False? Here, A is the amplitude of motion.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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1
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What will happen to the time period of a simple pendulum if temperature of the surroundings is significantly increased?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Damping force on a spring mass system is proportional to which of the following quantities?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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What is the ratio of speed of sound in air when measured after laplace correction to that measured by Newton’s formula?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Consider the case of normal modes of vibration for the air column with only one end closed. What is the length of the air column for the fundamental harmonic?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Consider standing waves in an air column with one end closed. What is a pressure node?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Laplace correction makes use of which of the following processes?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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y1 = 2sin(3x – 2t) & y2 = 3sin(3x – 2t + π/4). Find the expression for resultant displacement caused by superposition of the two waves.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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Consider the phenomenon of beats & select the correct statement.
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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1
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In a standing wave the amplitude of a particle is fixed, but varies from particle to particle. True or False?
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Oct 3, 2021
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Class-XI-PHYSICS
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AdilsonLima
cbse
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