If V6V R1200 Ohms R2 100 Ohms and D1 is a practical diode w

If V=6V, R1=200 Ohms, R2 = 100 Ohms, and D1 is a practical diode, what is the current through R2? 0 milliamperes 7 milliamperes 20 milliamperes 70 milliamperes

Solution

For a practical diode the voltage required for s forward bias of diode

Vd = 0.7 V

Only this voltage will appear across R2

So current through R2

I = 0.7V/100ohm = 7mA