Question

Identify the operation performed by the circuit given below :

JEE Main 2020 (04 Sep Shift 2)

Options

• A: NAND
• B: OR
• C: AND
• D: NOT

Question

Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these are forward biased. Built in potential in each diode is $0.7V$. For the input voltages shown in the figure, the voltage (in Volts) at point A is ________

JEE Main 2020 (09 Jan Shift 1)

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Question

The current $i$ in the network is

JEE Main 2020 (09 Jan Shift 2)

Options

• A: $0.2 \mathrm{A}$
• B: $0.6 \mathrm{A}$
• C: $0.3 \mathrm{A}$
• D: $0 \mathrm{A}$

Question

In the circuit shown below, is working as a $8 \mathrm{V} \mathrm{d}\mathrm{c}$ regulated voltage source. When $12 \mathrm{V}$ is used as an input, the power dissipated (in $\mathrm{m}\mathrm{W}$ ) in each diode is (Considering both zener diodes are identical) 

JEE Main 2020 (09 Jan Shift 2)

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Question

For extrinsic semiconductors; when doping level is increased;

JEE Main 2021 (25 Feb Shift 2)

Options

• A: Fermi-level of $p$ and $n$- type semiconductors will not be affected.
• B: Fermi-level of $p$-type semiconductor will go upward and Fermi-level of $n$-type semiconductors will go downward.
• C: Fermi-level of both p-type and n-type semiconductors will go upward for $T>T_F \mathrm{K}$ and downward for $T<T_F \mathrm{K},$ where $T_F$ is Fermi temperature.
• D: Fermi-level of $p$- type semiconductors will go downward and Fermi-level of $n$- type semiconductor will go upward.

Question

Choose the correct waveform that can represent the voltage across $R$ of the following circuit, assuming the diode is ideal one:

JEE Main 2021 (31 Aug Shift 1)

Options

• A:
• B:
• C:
• D:

Question

In the logic circuit shown in the figure, if input $A$ and $B$ are $0$ to $1$ respectively, the output at $Y$ would be $x$. The value of $x$ is _________.

JEE Main 2021 (16 Mar Shift 1)

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Question

For the forward biased diode characteristics shown in the figure, the dynamic resistance at $I_D=3 \mathrm{mA}$ will be ________$\mathrm{\Omega }.$

JEE Main 2021 (20 Jul Shift 2)

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Question

In a given circuit diagram, a $5 \mathrm{V}$ zener diode along with a series resistance is connected across a $50 \mathrm{V}$ power supply. The minimum value of the resistance required, if the maximum zener current is $90 \mathrm{mA}$ will be $\underline{ }$ $\text{Ω.}$

JEE Main 2021 (22 Jul Shift 1)

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Question

In the circuit, the logical value of $A=1$ or $B=1$ when potential at $A$ or $B$ is $5 \mathrm{V}$ and the logical value of $A=0$ or $B=0$ when potential at $A$ or $B$ is $0\mathrm{V}$.

The truth table of the given circuit will be :

JEE Main 2022 (25 Jul Shift 1)

Options

• A: $\begin{array}{ccc}A& B& Y\\ 0& 0& 0\\ 1& 0& 0\\ 0& 1& 0\\ 1& 1& 1\end{array}$
• B: $\begin{array}{ccc}A& B& Y\\ 0& 0& 0\\ 1& 0& 1\\ 0& 1& 1\\ 1& 1& 1\end{array}$
• C: $\begin{array}{ccc}A& B& Y\\ 0& 0& 0\\ 1& 0& 0\\ 0& 1& 0\\ 1& 1& 0\end{array}$
• D: $\begin{array}{ccc}A& B& Y\\ 0& 0& 1\\ 1& 0& 1\\ 0& 1& 1\\ 1& 1& 0\end{array}$

Question

Identify the solar cell characteristics from the following options :

JEE Main 2022 (28 Jul Shift 1)

Options

• A:
• B:
• C:
• D:

Question

In the following circuit, the correct relation between output $\left(Y\right)$ and inputs $A$ and $B$ will be

JEE Main 2022 (28 Jun Shift 1)

Options

• A: $Y=A·B$
• B: $Y=A+B$
• C: $Y=\overline{A·B}$
• D: $Y=\overline{A+B}$

Question

In the given circuit the input voltage $V_{\mathrm{in} }$ is shown in figure. The cut-in voltage of $p-n$ junction diode ($D_1$ or $D_2$) is $0.6 \mathrm{V}$. Which of the following output voltage $\left(V_0\right)$ waveform across the diode is correct?

JEE Main 2022 (28 Jun Shift 2)

Options

• A:
• B:
• C:
• D:

Question

In the circuit shown below, maximum Zener diode current will be _____ $\mathrm{mA}$.

JEE Main 2022 (26 Jul Shift 1)

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Question

The cut-off voltage of the diodes (shown in figure) in forward bias is $0.6 \mathrm{V}$. The current through the resister of $40\mathrm{\Omega }$ is _____ $\mathrm{mA}$.

JEE Main 2022 (27 Jun Shift 2)

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Question

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Photodiodes are used in forward bias usually for measuring the light intensity.

Reason R: For a $p-n$ junction diode, at applied voltage $V$ the current in the forward bias is more than the current in the reverse bias for $\left|V_z\right|>\pm V\ge \left|V_0\right|$ where $V_0$ is the threshold voltage and $V_z$ is the breakdown voltage.

In the light of the above statements, choose the correct answer from the options given below

JEE Main 2023 (25 Jan Shift 1)

Options

• A:  Both A and R are true and R is correct explanation A 
• B: Both A and R are true but R is NOT the correct explanation A
• C: A is false but R is true
• D: A is true but R is false 

Question

The output $Y$ for the inputs $A$ and $B$ of circuit is given by

Truth table of the shown circuit is :

JEE Main 2023 (30 Jan Shift 2)

Options

• A: $\left[\begin{array}{ccc}A& B& Y\\ 0& 0& 1\\ 0& 1& 1\\ 1& 0& 1\\ 1& 1& 0\end{array}\right]$
• B: $\left[\begin{array}{ccc}A& B& Y\\ 0& 0& 1\\ 0& 1& 0\\ 1& 0& 0\\ 1& 1& 1\end{array}\right]$
• C: $\left[\begin{array}{ccc}A& B& Y\\ 0& 0& 0\\ 0& 1& 1\\ 1& 0& 1\\ 1& 1& 1\end{array}\right]$
• D: $\left[\begin{array}{ccc}A& B& Y\\ 0& 0& 0\\ 0& 1& 1\\ 1& 0& 1\\ 1& 1& 0\end{array}\right]$

Question

A zener diode of power rating $1.6 \mathrm{W}$ is to be used as voltage regulator. If the zener diode has a breakdown of $8 \mathrm{V}$ and it has to regulate voltage fluctuating between $3 \mathrm{V}$ and $10 \mathrm{V}$ The value of resistance $R_s$ for safe operation of diode will be

JEE Main 2023 (10 Apr Shift 1)

Options

• A: $10 \mathrm{\Omega }$
• B: $12 \mathrm{\Omega }$
• C: $13.3 \mathrm{\Omega }$
• D: $13 \mathrm{\Omega }$

Question

Choose the correct statement about Zener diode:

JEE Main 2023 (01 Feb Shift 2)

Options

• A: It works as a voltage regulator in reverse bias and behaves like simple p-n junction diode in forward bias
• B: It works as a voltage regulator in both forward and reverse bias
• C: It works a voltage regulator only in forward bias
• D: It works as a voltage regulator in forward bias and behaves like simple p-n junction diode in reverse bias

Question

In the truth table of the above circuit the value of $\mathrm{X}$ and $\mathrm{Y}$ are :

JEE Main 2024 (09 Apr Shift 2)

Options

• A: 0,0
• B: 1,1
• C: 1,0
• D: 0,1

Question

In the given circuit, the breakdown voltage of the Zener diode is $3.0 \mathrm{V}$. What is the value of $I_z$ ?

JEE Main 2024 (29 Jan Shift 1)

Options

• A:  $3.3 \mathrm{mA}$
• B: $5.5 \mathrm{mA}$
• C: $10 \mathrm{mA}$
• D: $7 \mathrm{mA}$

Question

A Zener diode of breakdown voltage $10 \mathrm{V}$ is used as a voltage regulator as shown in the figure. The current through the Zener diode is

JEE Main 2024 (30 Jan Shift 1)

Options

• A: $50 \mathrm{mA}$
• B: $0$
• C: $30 \mathrm{mA}$
• D: $20 \mathrm{mA}$

Question

In the given circuit if the power rating of Zener diode is $10 \mathrm{mW}$, the value of series resistance $R_s$ to regulate the input unregulated supply is:

JEE Main 2024 (01 Feb Shift 1)

Options

• A: $\frac{3}{7} k\Omega$
• B: $10 \Omega$
• C: $1 k\Omega$
• D: $10 k\Omega$

Question

The output of the given circuit diagram is

JEE Main 2024 (31 Jan Shift 2)

Options

• A:
• B:
• C:
• D: