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*Simulator*

**Previous Years AIEEE/JEE Mains Questions**

**[AIEEE-2009]**

**Sol.**(3)

When postive cycle enters into diode it is forward bias while for negative half cycle it is reversed bias.

** [AIEEE-2009]**

**Sol.**(1)

(1) XOR gate (2) NAND gate (3) OR gate (4) NOT gate

**[AIEEE-2010]**

**Sol.**(3)

No need

** [AIEEE-2012]**

**Sol.**(3)

No need

** [JEE Main 2013]**

**Sol.**(4)

I $\alpha \frac{1}{\lambda}$ more $\lambda,$ less intensity and less energy.

**[JEE Main-2014]**

**Sol.**(4)

If n side is at low potential relative to P side then diode is forward bias.

$(1) \alpha=\frac{\beta^{2}}{1+\beta^{2}}$

(2) $\frac{1}{\alpha}=\frac{1}{\beta}+1$

(3) $\alpha=\frac{\beta}{1-\beta}$

(4) $\alpha=\frac{\beta}{1+\beta}$

**[JEE Main-2016]**

**Sol.**(1,3)

$\alpha=\frac{I_{C}}{I_{e}}, \beta=\frac{I_{C}}{I_{b}}$

$I_{e}=I_{b}+I_{c}$

$\Rightarrow \frac{I_{e}}{I_{c}}=\frac{I_{b}}{I_{c}}+1 \quad \Rightarrow \quad \frac{1}{\alpha}=\frac{1}{\beta}+1$

**[JEE Main-2016]**

**Sol.**(4)

Output of OR gate is 0 when all inputs are 0 & output is 1 when atleast one of the input is 1.

Observing output x :- It is 0 when all inputs are 0 & it is 1 when atleast one of the inputs is 1.

$\therefore$ OR gate

(1) Linear decrease for Cu, linear decrease for Si.

(2) Linear increase for Cu, linear increase for Si.

(3) Linear increase for Cu, exponential increase for Si

(4) Linear increase for Cu, exponential decrease for Si

**[JEE Main-2016]**

**Sol.**(4)

Factual

Cu is conductor so with increase in temperature, resistance will increase

Si is semiconductor so with increase in temperature resistance will decrease

(1) Zener diode, Solar cell, Simple diode, Light dependent resistance

(2) Simple diode, Zener diode, Solar cell, Light dependent resistance

(3) Zener diode, Simple diode, Light dependent resistance, Solar cell

(4) Solar cell, Light dependent resistance, Zener diode, Simple diode

**[JEE Main-2016]**

**Sol.**(2)

Factual

(1) $135^{\circ}$

(2) $180^{\circ}$

(3) $45^{\circ}$

(4) $90^{\circ}$

**[JEE Main-2017]**

**Sol.**(2)

In common emitter amplifier circuit input and out put voltage are out of phase. When input

voltage is increased then $\mathrm{i}_{\mathrm{b}}$ is increased, i also increases so voltage drop across $\mathrm{R}_{\mathrm{c}}$ is increased.

However increase in voltage across $\mathrm{R}_{\mathrm{C}}$ is in opposite sense.

**[JEE Main-2018]**

**Sol.**(2)

Nice tq vry much

Nice

Too nice

Thank you so much ðŸ’•