You visited us 5 times! Enjoying our articles? Unlock Full Access!

Reverse Bias

For the circu...

Question

For the circuit shown in the figure. The equivalent resistance between point A and B for the two cases (i) $V_{A} > V_{B}$ (ii) $V_{B} > V_{A}$ respectively is _ $Ω$ and __ $Ω$ respectively ( $D_{1}$ and $D_{2}$ are ideal diodes)

25, \infty

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

50, \infty

No worries! We‘ve got your back. Try BYJU‘S free classes today!

\infty, 25

No worries! We‘ve got your back. Try BYJU‘S free classes today!

50, 50

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $25, \infty$
For $V_{A} > V_{B}$
Both diodes are forward biased
so equivalent resistance will be the parallel connection of the resistances.
$R_{e q} = \frac{R_{1} R_{2}}{R_{1} + R_{2}}$

Substitute the values:
$R_{1} = \frac{50 \times 50}{50 + 50} = 25 Ω$

If $V_{A} < V_{B}$

Both of the diodes are reverse biased and they will not let the circuit to be closed.
Therefore, the equivalent resistance of the equivalent circuit will be infinity

Suggest Corrections

Similar questions

Q. In the circuit shown, the diodes are ideal.

A_{1}

and

A_{2}

are ammeters of resistance

5 Ω

each. The potentials of the points A, B, C and D are

V_{A}, V_{B}, V_{C}

and

V_{D}

respectively.

| V_{A} - V_{B} | = 10 V

A, B and C are voltmeters of resistance R,1.5 R and 3R respectively as shown in the figure.When some potential difference is applied between X and Y, the voltmeter readings are $V_{A}, V_{B}$ and $V_{C}$ respectively.Then :

Q. In the circuit shown below,

V_{A}

and

V_{B}

are the potentials at A and B, R is the equivalent resistance between A and B,

S_{1}

and

S_{2}

are switches, and the diodes are ideal

Q. The equivalent resistance of the circuit, as shown in the figure, between points A and B, if

(V_{A} < V_{B})

Q. For the circuit given the current through

4 Ω

resistor and the potential difference

V_{A} - V_{B}

respectively are:

Join BYJU'S Learning Program

For the circuit shown in the figure. The equivalent resistance between point A and B for the two cases (i)VA>VB (ii) VB>VArespectively is _______ Ω and ________ Ω respectively (D1 and D2 are ideal diodes)

For the circuit shown in the figure. The equivalent resistance between point A and B for the two cases (i) $V_{A} > V_{B}$ (ii) $V_{B} > V_{A}$ respectively is _ $Ω$ and __ $Ω$ respectively ( $D_{1}$ and $D_{2}$ are ideal diodes)