Question

Write down the approximate drops of voltages across an LED and a Si-diode respectively when they are forward biased at room temperature.​

Answer 1

Since diode D

1

is forward biased, so voltage drop across it is 0.7V

As the diodes D

1

and D

2

are connected in parallel, so voltage drop across is equal to that across D

1

i.e. 0.7V

Since, D

2

is reversed biased, so no current flows through it and so power dissipated by D

2

is zero.