Time left =
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The amplitude of a magnetic field, which is part of a harmonic electromagnetic wave in vacuum, is B0?=510nT. What is the amplitude of the electric field of the wave?
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Figure shows a rectangular loop being pulled out in magnetic field B with constant speed v, then force and power by external agent vary with speed v as :
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The dimensions of (μ0ε0)−1/2 are
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One mole of an ideal gas goes from an initial state AA to final state BB via two processes : It first undergoes isothermal expansion from volume VV to 3V3V and then its volume is reduced from 3V3V to VV at constant pressure. The correct P−VP−V diagram representing the two processes is
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An α− particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25Wb/m2.0.25Wb/m2. The de Broglie wavelength associated with the particle will be
(Take h=6.63×10−34Jsh=6.63×10−34Js, e=1.6×10−19Ce=1.6×10−19C)
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The potential energy of a particle in a force field is U=A/r2−B/r
where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is
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Two spheres A and B of masses m1 and m2 respectively collide. A is at rest initially and B is moving with velocity v along x-axis. After collision B has a velocity in a direction perpendicular to the original direction. The mass A moves after collision in the direction
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Two cylinders A and B of equal capacity are connected to each other via a stop clock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is
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In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6Hz6Hz. When tension in B is slightly decreased, the be at frequency increases to 7Hz7Hz. If the frequency of A is 530Hz530Hz, the original frequency of B will be :
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Light with an average flux of 20Ω/cm2 falls on a non-reflecting surface at normal incidence having surface area 20cm2. The energy received by the surface during time span of 1minute is :
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Estimate the speed with which electrons emitted from a heated cathode of an evacuated tube impinge on the anode maintained at a potential difference of 500Vwith respect to the cathode. Ignore the small initial speeds of the electrons. The specific charge of the electron i.e., its e/m is given to be 1.76×1011Ckg−1
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Estimate the speed with which electrons emitted from a heated cathode of an evacuated tube impinge on the anode maintained at a potential difference of 500Vwith respect to the cathode. Ignore the small initial speeds of the electrons. The specific charge of the electron i.e., its e/m is given to be 1.76×1011Ckg−1
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