TNSET 2024 Paper 2 Electronic Science Question Paper (06-Mar-2025) (Shift-1)

Question 1

The common drain circuit has a FET with $Y_{fs}$=3000 ÂµS, $R_{gs}$=100 MÎ© and $r_d$=50 KÎ©. Determine the device input impedance.

Accepted Answer

331 Ω

Answer

$1.25 	imes 10^9 $ Ω

Answer

600 KΩ

Answer

0.94

Question 2

Which among the following represents the energy level of quantum Dot ?

Accepted Answer

None of the above

Answer

$E_n = \frac{\pi^2 \hbar^2 n^2}{2m_e a^2}$; $n=1,2,3,......$

Answer

$E_{n_1 n_2} = \frac{\pi^2 \hbar^2}{2m_e} \left( \frac{n_1^2}{a_x^2} + \frac{n_2^2}{a_y^2} \right)$; $n_1,n_2 =1, 2, 3,........$

Answer

$E_{n_1 n_2 n_3} = \frac{\pi^2 \hbar^2}{2m_e} \left( \frac{n_1^2}{a_x^2} + \frac{n_2^2}{a_y^2} + \frac{n_3^2}{a_z^2} \right)$; $n_1,n_2,n_3 =1, 2, 3,.......$

Question 3

A solar cell consists of 400 cells with 40 elements series connected while 10 elements are parallely connected. If each cell can produce an output voltage and current of $V_o$=0.45 V and $I_o$=57 mA, the maximum charging voltage required is

Accepted Answer

18 V

Answer

9 V

Answer

36 V

Answer

50 V

Question 4

MOSFETs exhibit a non-linear relationship between input voltage and output current due to the device construction. The non-linear relationship is connected through the device parameter 'K'. Calculate 'K' for a specific MOSFET operating with an input voltage of 6 V and output current of 10 mA. The Threshold voltage of the chosen MOSFET is 4 V.

Accepted Answer

$2.5 	imes 10^{-3} A/V^2$

Answer

$0.25 	imes 10^{-3} A/V^2$

Answer

$0.50 	imes 10^{-3} A/V^2$

Answer

$1.00 	imes 10^{-3} A/V^2$

Question 5

Given below are the two statementsI. Graphene in its purest and defect free form has electrical conductivity lesser than that of Gold and CopperII. It is possible to develop graphene in the form of nano-ribbons and quantum dotsChoose the correct option from the list given below.

Accepted Answer

II is correct while I is wrong

Answer

I is correct while II is wrong

Answer

Both I and II are correct

Answer

Both I and II are wrong