EWB SY ETRX

If the input to the ideal comparator shown in the figure is a sinusoidal signal of 8 V (peak to peak) without any DC component, then the output of the comparator has a duty cycle of

• 1\2

• 1\3

• 1\6

• 1\12

For a system to work, as oscillator the total phase shift of the loop gain must be equal to

• 90°

• 45°

• 270°

• 360°

An amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly a

• sine wave

• square wave

• triangular wave

• Option 1 or 2

A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?

• 3.6

• 7.2

• 8.4

• 10

Which of the following is the 1's complement of 10?

• 01

• 110

• 11

• 10

• NOTA

Derived units are obtained from various combinations of

• electrical quantities

• fundamental units

• metric prefixes

• international standards

If current varies periodically from zero to a maximum, back to zero, and then repeats, the signal is:

• direct

• alternating

• pulsating

• repetitive

If we use an AND gate to inhibit a signal from passing, one of the inputs must be _________.

• LOW

• HIGH

• inverted

• floating

What is the resolution of a digital-to-analog converter (DAC)?

• It is the comparison between the actual output of the converter and its expected output.

• It is the deviation between the ideal straight-line output and the actual output of the converter.

• It is the smallest analog output change that can occur as a result of an increment in the digital input.

• It is its ability to resolve between forward and reverse steps when sequenced over its entire range.

What is the resultant binary of the decimal problem 49 + 1 = ______ ?

• 01010101

• 00110101

• 00110010

• 00110001