ISRO LPSC Electronic Mechanic Paper 2018

If 100 coulomb of charge passes through a conductor in 25 seconds, the current in the conductor is _____
(a) 1 A
(b) 4 A
(c) 10 A
(d) 2.5 A

If the capacity of a battery is 4000mAh, it can supply 4 Ampere current for
(a) 120 min
(b) 240 min
(c) 60 min
(d) 30 min

The peak to peak value of a sine wave is 300 V. Its rms value is ______
(a) 70.72 V
(b) 141.4 V
(c) 14.14 V
(d) 106.08 V

A forward potential of 7 V is applied across a network consisting a schottky diode with 1 Kilo Ohm resistor in series. The current through the diode is _______
(a) 10 mA
(b) 7.3 mA
(c) 6.8 mA
(d) 0 mA

The decimal equivalent of 11100 is _____
(a) 23
(b) 31
(c) 27
(d) 28

Number of control lines required for 16 to 1 multiplexer is ______
(a) 3
(b) 4
(c) 8
(d) 2

A 6 bit counter is used to count from 0,1,2,…..n. The value of n is ______
(a) 16
(b) 15
(c) 32
(d) 63

For a sine wave with a frequency of 1000 Hz, the time period is _____
(a) 1000 ms
(b) 100 ms
(c) 10 ms
(d) 1 ms

The disadvantage of SMPS over conventional linear power supply is_______
(a) Low efficiency
(b) Bulky components
(c) Generates strong electromagnetic interference field
(d) Low cost

The oscillator that gives good frequency stability is ______
(a) Hartley Oscillator
(b) Colpitts Oscillator
(c) Crystal Oscillator
(d) RC phase shift oscillator