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Placement Papers>>ISRO

# ISRO tech Placement Paper

Paper Type : General - other
Test Date : 22 April 2007
Test Location : Sathyabhama, Chennai.

ISRO PAPER ON 22nd APRIL AT CHENNAI

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 from plus two book..
4.simple problem from parallel and series connection of resistor...
5.plus two matrix problem 1 a b+c

1 b a+c

1 c b+a

ans: zero
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
ans: iax -iax

(e + e )/2
10.what is the o/p of 4:1 MUX?
11.enegry stored in variable capacitor and constant voltage...
ans : 2

0.5CV

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. three problems from RLC ckt

BY,
GURUBHARAN

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