JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Topic Test - Photo Electric Effect, X-Rays & Matter Waves

  • question_answer
    A radio transmitter operates at a frequency of 880 kHz and a power of 10 kW. The number of photons emitted per second are           

    A) \[1.72\times {{10}^{31}}\]

    B) \[1327\times {{10}^{34}}\]

    C) \[13.27\times {{10}^{34}}\]     

    D) \[0.075\times {{10}^{-34}}\]

    Correct Answer: A

    Solution :

    [a] Number of photons emitted per second \[n=\frac{p}{h\nu }=\frac{10\times {{10}^{3}}}{6.6\times {{10}^{-34}}\times 880\times {{10}^{3}}}=1.72\times {{10}^{31}}\]

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