VSSC Electronic Mechanic Paper 2012

Vikram Sarabhai Space Center Electronic Mechanic Paper 2012

A parity check usually can detect ______
(a) 1 bit error
(b) 2 bit error
(c) 8 bit error
(d) Any bit error

A decade counter requires
(a) Two flip-flops
(b) Three flip-flops
(c) Four flip-flops
(d) Ten flip-flops

A byte is a group of
(a) 2 bits
(b) 4 bits
(c) 8 bits
(d) 16 bits

Introduction of negative feedback in a system
(a) increases distortion
(b) decreases the stability
(c) decreases the input impedance
(d) decreases the output impedance

An RL circuit has a resistance of 3 Ohms and a reactance of 4 ohms, the impedance of the circuit is
(a) 5 Ohms
(b) 7 Ohms
(c) 1 Ohm
(d) 1.33 Ohms

A capacitor of 40 Micro-farad is charged to a potential difference of 500V, the charge acquired by the capacitor in Coloumb is ______
(a) 12.5
(b) 2
(c) 0.2
(d) 0.02

Which of the following is used as a passive component in electronic circuit?
(a) Resistor
(b) Vacuum Triode
(c) Diode
(d) Transistor

A device whose characteristics are very close to that of an ideal voltage source is a
(a) SCR
(b) FET
(c) MOSFET
(d) Zener diode

A self inductance of two coils are 4mH and 9mH respectively. If the coefficient of coupling is 0.5, the mutual inductance between the coils is _______
(a) 6.5mH
(b) 18mH
(c) 3.0mH
(d) 12.5mH

The power factor of a purely resistive circuit is _______
(a) Zero
(b) Lagging
(c) Leading
(d) Unity