Question

34. Find VAB (PN diode is ideal).

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Answer 1

Answer:

10is true answer I hope u learn

Answer 2

Given:

External voltage = 30 V and  PN diode is ideal.

We have to find: the value of $V_{AB}$ = ?

Solution:

There are 2 loops in the figure.

When PN diode is forward biased, it acts as a conductor .

Draw the equivalent resistance diagram.

The firstly two resistors are in parallel:

$\frac{1}{R} = \frac{1}{10} + \frac{1}{10}$

⇒ $\frac{1}{R} = \frac{1+1}{10}=\frac{2}{10}$

⇒ R = 5 Ω

Also,

The other two resistors are in series:

R = $R_1 + R_2$

⇒ R = 10 + 5

⇒ R = 15 Ω

By Ohm's law,

V = IR

⇒ I = $\frac{30}{15}$

⇒ I = 2 Amp

∴ $V_{AB}$ = 10 × 2 + 10 V

$V_{AB}$ = 30 V

Thus, the required "option 3) 30 V" is correct.