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A rod of glass (μ=1.5) and of square cross section is bent into the shape shown in the figure. A parallel beam of light falls on the plane flat surface A as shown in the figure. If d is the width of a side and R is the radius of circular arc then for what maximum value of dR light entering the glass slab through surface A emerges from the glass through B
11
Sep
A rod of glass (μ=1.5) and of square cross section is bent into the shape shown in the figure. A parallel beam of light falls on the plane flat surface A as shown in the figure. If d is the width of a side and R is the radius of circular arc then for what [...]
Two blocks, of mass 1 kg and 2 kg respectively, are connected by a spring and kept on a frictionless table. The blocks are pulled apart, so that the spring is stretched, and released from rest. At a certain instant of time, the block of mass 1 kg, is found to be moving at a speed 2 m/s. What must be the speed of the other block at this instant
11
Sep
Two blocks, of mass 1 kg and 2 kg respectively, are connected by a spring and kept on a frictionless table. The blocks are pulled apart, so that the spring is stretched, and released from rest. At a certain instant of time, the block of mass 1 kg, is found to be moving at a [...]
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and released from rest. At a certain instant of time ,
are connected by a spring and kept on a frictionless table. The blocks are pulled apart ,
is found to be moving at a speed 2 m/s. What must be the speed of the other block at this instant ,
of mass 1 kg and 2 kg respectively ,
so that the spring is stretched ,
the block of mass 1 kg ,
Two blocks ,
A shell at rest at the origin explodes into three fragments of masses 1kg 2kg & m kg.The 1kg & 2kg pieces fly off with speed of 5m/s along x-axis & 6m/s along y-axis respectively.If the m kg piece flies off with speed of 6.5 m/s ,the total mass of shell must be?
11
Sep
A shell at rest at the origin explodes into three fragments of masses 1kg 2kg & m kg.The 1kg & 2kg pieces fly off with speed of 5m/s along x-axis & 6m/s along y-axis respectively.If the m kg piece flies off with speed of 6.5 m/s ,the total mass of shell must be? A shell [...]
A ray of light travels from a medium of refractive index μ to air. Its angle of incidence in the medium is i, meansured from the normal to the boundary , and its angle of deviation is δ.δ is plotted against i. Which of the following best represents the resulting curve ?
11
Sep
A ray of light travels from a medium of refractive index μ to air. Its angle of incidence in the medium is i, meansured from the normal to the boundary , and its angle of deviation is δ.δ is plotted against i. Which of the following best represents the resulting curve ? A ray of [...]
The radiation emitted when an electron jumps from n = 3 to n = 2 orbit in a hydrogen atom falls on a metal to produce photoelectrons. The electrons from the metal surface with maximum kinetic energy are made to move
11
Sep
The radiation emitted when an electron jumps from n = 3 to n = 2 orbit in a hydrogen atom falls on a metal to produce photoelectrons. The electrons from the metal surface with maximum kinetic energy are made to move A moving hydrogen atom makes a head-on collision with a stationary hydrogen atom. Before [...]
A stationary bomb explodes into two parts of masses in the ratio of 1 : 3. If the heavier mass moves with a velocity 4 m/s. what is the velocity of lighter mass ?
11
Sep
A stationary bomb explodes into two parts of masses in the ratio of 1 : 3. If the heavier mass moves with a velocity 4 m/s. what is the velocity of lighter mass ? A stationary bomb explodes into two parts of masses in the ratio of 1 : 3. If the heavier mass moves [...]
An optical fibre consists of core of mu1 surrounded by a cladding of mu2< mu1. A beam of light enters from air at an angle alpha with axis of fibre. The highest alpha for which ray can be travelled through fibre is
11
Sep
An optical fibre consists of core of mu1 surrounded by a cladding of mu2< mu1. A beam of light enters from air at an angle alpha with axis of fibre. The highest alpha for which ray can be travelled through fibre is A ray of light travels from an optically denser to rarer medium. The [...]
A hydrogen-like atom (atomic number Z) is in a higher excited state of quantum number n. This excited atom can make a transition to the first excited state by successively emitting two photons of energies
11
Sep
A hydrogen-like atom (atomic number Z) is in a higher excited state of quantum number n. This excited atom can make a transition to the first excited state by successively emitting two photons of energies A moving hydrogen atom makes a head-on collision with a stationary hydrogen atom. Before collision both atoms are in ground [...]
An 80 kg man is riding on a small 40 kg cart at a speed of 4m/s.He jumps off the cart with zero horizontal speed.What is the resulting change in the speed of the cart?
11
Sep
An 80 kg man is riding on a small 40 kg cart at a speed of 4m/s.He jumps off the cart with zero horizontal speed.What is the resulting change in the speed of the cart? An 80 kg man is riding on a small 40 kg cart at a speed of 4m/s.He jumps off the [...]
A hydrogen-like atom with atomic number Z is found to be in an excited state corresponding quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a transition to quantum state n, a photon of energy
11
Sep
A hydrogen-like atom with atomic number Z is found to be in an excited state corresponding quantum number 2n. It can emit a maximum energy photon of 204 eV. If it makes a transition to quantum state n, a photon of energy A hydrogen-like atom with atomic number Z is found to be in an [...]