The diode used at a constant potential drop of 0.5 V at all currents and maximum power rating of 100 mW. What resistance must be connected in series diode, so that current in circuit is maximum?

Options

A. `200 Omega`
B. `6.67 Omega`
C. `5 Omega`
D. `15 Omega`

Answer

C

Explanation

Current passing in the circuit is
`I=P/V = (100 xx 10^(-3))/0.5 = 0.2 A`
Value of connected series resistance,
`R= (1.5 -0.5)/0.2 rArr R=1/0.2`
`therefore R=5Omega`