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JEE MAIN 2021
27-07-21 S1
Question
A radioactive sample has an average life of 30 ms and is decaying. A capacitor of capacitance $200 \mu \mathrm{~F}$ is first charged and later connected with resistor ' R '. If the ratio of charge on capacitor to the activity of radioactive sample is fixed with respect to time then the value of ' R ' should be $\_\_\_\_$ Ω.
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