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In YDSE wavelength of light used is 600 nm. At a point intensity is 50% of maximum value. What is path difference at that point__________
150 nm
200 nm
300 nm
600 nm
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A block of mass 20 kg is moved with constant velocity along an inclined plane of inclination 37° with help of a force of constant power 50 W. If the coefficient of kinetic friction between block and surface is 0.25, then what fraction of power is used against gravity?
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A solenoid has 1000 turns per metre length. If a current of 5A is flowing through it, then magnetic field inside the solenoid is_________
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