Question

When a 20V battery is connected across an unknown resistor there is a current of 50 mA in the circuit. Find the value of the resistance of the resister

Answer 1

Given:-

V = 20 V

I = 50 mA = 50 × 1/10³ A

Formula:-

V = IR

» R = V/I

» R = 20 × 10³/50

» R = 400 Ω

Answer 2

Given :

• Voltage of the battery (V) = 20 V

• Current in the unknown resistor (I) = 50 mA = 0.05 A

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Answer:

• As we know that,

➩ V = IR

• Putting the all given values in above given formula we get :]

➩ 20 = 0.05 × R

➩ R = 20/0.05

➩ R = 400 Ω

Therefore, the value of the resisiatnce of the resisitor is 400 Ω.

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