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a light of wavelength λ is incident on a metal sheet of work function 2ev. The wavelength I varies with time as I=3000+40t., where I is in A and t is in sec.The power incident on the metal surface is 100W. the signal is swit ...
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*Image* the cells given in the circuit are 5v each and have internal resistance of 0.2 ohms, then the reading in the ideal volt meter is?? ...
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If the number of even divisors of 4320 is M then the number of primes less than or equal to M is?? ...