Question

A cell of voltage 10V connected with resistance 'R' and a bulb of 20 ohm in series. A current of 2mA (milliampere) is flowing through the circuit . Calculate the value of 'R' . Plz answer fast...!!​

Answer 1

Answer:

$r = \frac{potential}{current} \\ 2 \: milliampere = 2 \times {10}^{ - 3} ampere \\ r = \frac{10}{2 \times {10}^{ - 3} } \\ = \frac{10000}{2} \\ = 5000$

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