16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

(C) Lead Sulphide

The value of (1 + i)8 is given by

(A) 8 (B) 2
(C) 16 (>) 4
The recurrence relation
போடி (x) =(n + ۱(۶ , | (0 ഷൃ corresponds to

(4) Laguerre polynomials (B) Legendre polynomials
(C) Hermite polynomials (D) Bessel polynomials

Bessel functions of the second kind is also known as:
(A) Gamma function (8) Beta function
(C) Generating function (D) Neumann function

Four coins are tossed simultaneously. What is the probability that none of them are heads ?

(^) 6 (B) 1/4
(0) 38 (D) 12
Which among the following is likely to the be Fourier transform of the function
2
f(x) =Nee ‏و‎
‎(A) N ox 4० ௫ N ட்‌ 4०
२2० 2a
2 2
(C) Ne (D) N €>* ५

2५.

Which among the following is a current-controlled negative resistance device ?

(4) A bi-junction transistor (B) A uni-junction transistor

(C) A field-effect transistor (D) A p-njunction diode

What is the state of a JFET defined by the condition ‏وی۷‎ =0 V, and Vpg > |VP| ?

(A) Ip becomes maximum. (B) Breakdown occurs in the channel.
(೮) 88 becomes maximum. (D) Becomes a voltage controlled resistor.

Which among the following materials is used to make a light dependent resistor ?

(4) Gallium Arsenide (B) Indium Phosphide
(6) 5111001. (D) Cadmium Sulphide
Which is the most commonly used material to make IR LEDs ?

(4) Gallium Arsenide (B) Germanium

(6) Silicon (D) Cadmium Selenide

Which among the following materials is the least preferred in making a p-n junction solar
cell ?
(A) Amorphous Silicon (B) Cadmium Telluride

D) Copper Indium Gallium diselenide

5 | (019/2021
[P.T.0.]