Q. An p-n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. The current (I) in the resistor R can be shown by:
[AIEEE-2009]
[AIEEE-2009]
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Sol. (3) When postive cycle enters into diode it is forward bias while for negative half cycle it is reversed bias.
Q. The logic circuit shown below has the input wave forms ‘A’ and ‘B’ as shown. Pick out the correct output waveform.
[AIEEE-2009]
[AIEEE-2009]
Q. The combination of gates shown below yields.
(1) XOR gate (2) NAND gate (3) OR gate (4) NOT gate
[AIEEE-2010]
(1) XOR gate (2) NAND gate (3) OR gate (4) NOT gate
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Sol. (3) No need
Q. Truth table for system of four NAND gates as shown in figure is:
[AIEEE-2012]
[AIEEE-2012]
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Sol. (3) No need
Q. The I-V characteristic of an LED is
[JEE Main 2013]
[JEE Main 2013]
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Sol. (4) I $\alpha \frac{1}{\lambda}$ more $\lambda,$ less intensity and less energy.
Q. The forward biased diode connection is:
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Sol. (4) If n side is at low potential relative to P side then diode is forward bias.
Q. For a common emitter configuration, if $\alpha$ and $\beta$ have their usual meanings, the incorrect relationship between $\alpha$ and $\beta$ is
$(1) \alpha=\frac{\beta^{2}}{1+\beta^{2}}$
(2) $\frac{1}{\alpha}=\frac{1}{\beta}+1$
(3) $\alpha=\frac{\beta}{1-\beta}$
(4) $\alpha=\frac{\beta}{1+\beta}$
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Sol. (1,3) $\alpha=\frac{I_{C}}{I_{e}}, \beta=\frac{I_{C}}{I_{b}}$ $I_{e}=I_{b}+I_{c}$ $\Rightarrow \frac{I_{e}}{I_{c}}=\frac{I_{b}}{I_{c}}+1 \quad \Rightarrow \quad \frac{1}{\alpha}=\frac{1}{\beta}+1$
Q. If a, b, c, d are inputs to a gate and x is its output, then as per the following time graph, the gate is
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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
Q. The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400K, is best described by :-
(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
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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
Q. Identify the semiconductor devices whose characteristics are given below, in the order (a), (b), (c), (d) :-
(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
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(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
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Sol. (2) Factual
Q. In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be :
(1) $135^{\circ}$
(2) $180^{\circ}$
(3) $45^{\circ}$
(4) $90^{\circ}$
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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.
Q. The reading of the ammeter for a silicon diode in the given circuit is :-
[JEE Main-2018]
[JEE Main-2018]
Thank you so much 👍
thank u so much
Thanks from my side💋💌
Thanks but we need more questions. Please upload more previous year questions
It will be better, to have solutions along with the correct answer. It is time saving as one can easily figure out their mistakes.
Good!
BEST SOLUTIONS ACHHE BANAO
Thanks 😊😘
Increase the no. Of questions please
tq
good collection of question
Very helpful these questions are
Thank you
Once check a,b,c,d in puts ques
Helpful
Thank you 😊 so much 💕 esaral
very helpful
Bad itne hi hai kya
It was wow
Thank you
😊👍✌
It was helpful
Thank you
😊👍✌
It was helpful..
Thank you ☺️
wow
super
Thanks hope you will make avalilabilty some more questions
Great app sir
easy
helped me a lot thq
Usefull app
Have you given neet or jee
Useful & thanks 😊
Mogambo khush hua
Are you suri sirs student
suri sir ko mei vedantu se pehle se janta hu
solution of aieee 2012 is wrong
the correct answer is (2)
Good one, Thanks
LATEST SOLUTIONS KAHA HE ????
The second question of JEE 2016 is wrong.
If you look at the 5th row of the graph closely, values of d, c, b, a are 0 and value of x is 1. If it were an OR gate, value of x would’ve been 0 as well.
AIEEE 2012 KA BHI 😠😠😠😠😠
AIEEE 2010 ka solution do 😠😠😠
So I’m not the only one who completes syllabus right before the exam day
thanks ,,used as a good warm up on semicondutors
Itne easy aate h ky sach me?
thanks
thanks
Question 2016 first question is wrong
Thanks
tqqq
bhot tatti question hain
kha na bhai fir itna hi maan kaar raha😂😂😂
jee main 2019 and 2020 question also has to add here
Good question
this was great. thanks
Sukriya
Thanks 😊
Thank you for amazing questions
thnk u
no. of questions should be increased……
dhanyawaad,
its very helpful.Tq so much
SOME MORE QUESTIONS CAN BE ADDED
Good job.
Thnq
tq sir
Good
thank you very much
Thank you 😊 very much sir
Nice tq vry much
Nice
Too nice
Thank you so much 💕