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When a diode is foward biased it has a voltage drop of $0.5\; V$ . The safe unit of current through the diodes is $10\; mA$ . If a battery of emf is $1.5\; V$ is used in the circuit, the volume of minimum resistance (in ohms) to be connected in series with the diode so that the current doesn't exceed the safe limit is

Option: 1 100
Option: 2 50
Option: 3 30
Option: 4 200

Answers (1)

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$I_{max}=10 \ mA=10 ^{-2} \ A$

$V_R=1.5-0.5= I_{max}R\\ \\ R=\frac{1}{I_{max}}=100 \Omega$

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avinash.dongre

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