ISRO Scientist SC- Electronics

Pattern of Exam Questions

1.if diameter of antenna increase by 3,then gain of the antenna will be,
a.increase by 3
b.decrease by 3
c.no change in gain

2.more number of problem from zener diode...

3.vector sum questions

4. problems from parallel and series connection of resistor...

5. The value of this determinant

1 a b+c

1 b a+c

1 c b+a

ans: zero

6. solve (D2+16)y=cos4x
ans:y= 4x+Bsin 4x+x/8 sin 4x

7.in half adder circuit... what are the gates used?

8.conversion problem fron digital systems octal to binary
66.3(octal) to binary

9.formula for cos ax=? in terms of expo

10.what is the o/p of 4:1 MUX?

11.enegry stored in variable capacitor and constant voltage...


12.WHICH OF THE FOLLOWING OSILLATOR HAVE HIGH ACCURACY? refer all the osillator
13.they given a circuit,which convert binary to.....?

a. BCD
b.excess 3
c.gray
d.none of these

14.output impedance of ideal op-amp is...? ans: zero.

15.which one of the following is correct formula? choice are simple formula like V=IR,F=eE, etc...)

16. from RLC ckt

This is based on the past experience of various candidates.