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The given circuit works as:

Find the correct combination of \( A \), \( B \), \( C \) and \( D \) inputs which can cause the LED to glow.

The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at \( V_z = 5 \, \text{V} \) and the desired current in load is \( 5 \, \text{mA} \). The unregulated voltage source can supply upto \( 25 \, \text{V} \). Considering the Zener diode can withstand four times of the load current, the value of resistor \( R_s \) (shown in circuit) should be ______ \( \Omega \).

A diode has Zener voltage of \( 10 \, \text{V} \) and maximum power dissipation of \( 0.5 \, \text{W} \), then the minimum resistance to be used in series with this diode for safety when it is connected to a \( 25 \, \text{V} \) power supply is _____ \( \Omega \).

Two \( 4 \) bits binary numbers, \( A = 1101 \) and \( B = 1010 \) are given in the inputs of a logic circuit shown in figure below. The output \( (Y) \) will be:

Identify the correct truth table of the given logic circuit.

The output \( Y \) for the given inputs \( A \) and \( B \) to the circuit is:

Assuming in forward bias condition there is a voltage drop of \( 0.7 \, \text{V} \) across a silicon diode, the current through diode \( D_1 \) in the circuit is ________ \( \text{ma} \). (Assume all diodes in the given circuit are identical)

Consider a circuit consisting of a capacitor \( (20 \, \mu \text{F}) \), resistor \( (100 \, \Omega) \) and two identical diodes as shown in figure. The resistance of diode under forward biasing condition is \( 10 \, \Omega \). The time constant of the circuit is \( \alpha \times 10^{-3} \, \text{s} \). The value of \( \alpha \) is ______.

A voltage regulating circuit consisting of Zener diode, having break-down voltage of \( 10 \, \text{V} \) and maximum power dissipation of \( 0.4 \, \text{W} \), is operated at \( 15 \, \text{V} \). The approximate value of protective resistance in this circuit is ______ \( \Omega \).

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: A diode under reverse-biased condition provides very small current which is nearly independent of voltage until a critical limit at which the current increases drastically.
Reason R: Below the critical voltage limit, only majority charge carriers flow which increases drastically above critical voltage.
Choose the correct answer from the options given below:

If \( X \) and \( Y \) are the inputs, the given circuit works as ________.

In a semiconductor p-n diode, the doping concentrations on p-side and n-side are \( 10^{15} \) \( \text{atoms}/\text{cm}^3 \) and \( 10^{18} \) \( \text{atoms}/\text{cm}^3 \), respectively. Which one of the following statements is true?

The maximum rated power of the LED is \( 2 \, \text{mW} \) and it is used in the circuit with input voltage of \( 5 \, \text{V} \) as shown in the figure below. The current through resistance \( R_S \) is \( 0.5 \, \text{mA} \). The minimum value of the resistance of \( R_S \), to ensure that the LED is not damaged is _____ \( \text{k}\Omega \).

For the given circuit (shown in part (A)) the time dependent input voltage \( v_{in}(t) \) and corresponding output \( v_{0}(t) \) are shown in the part (B) and part (C), respectively. Identify the components that the used in the circuit between points \( X \) and \( Y \).

For the given logic circuit, which of the following inputs combination will make both LED-1 and LED-2 to glow?

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JEE Main 2026 21st Jan Morning Shift

The given circuit works as: