Electrical Engineering Answers

A series R L circuit is connected to a 110V, 50 Hz ac source. If the voltage across the resistor is 85 V, 

find the power dissipated in the circuit, if the value of inductor is 0.05 H

Find the impedance of the circuit if supply voltage is 

v(t) 110sin(20t 30 ) 220 cos(20t 90 )V

0 0

   

and the current 

i(t) 30cos(20t 60 ) 20sin(20t 60 )A

d. A resistance strain gage with a gage factor of 2.4 is mounted on a steel beam whose modulus of 

elasticity is 2x106kg/cm2

. The strain gage has an unstrained resistance of 120.0Ω which 

increases to 120.1Ω when the beam is subjected to a stress. Calculate the stress at the point 

where the strain gage is mounted

a. A 20 V dc voltage is measured by analog and digital multi-meters. The analog instrument is on 

its 25 V range, and its specified accuracy is ± 2%. The digital meter has a 3½ digital display 

and an accuracy of ± (0.6+1). Determine measurement accuracy in each case.

b. A digital frequency meter has a time base from 1 MHz clock generator frequency divided by 

decade counters. Determine the measured frequency when a 1.512 kHz sine wave is applied 

and the time base uses (a) six decade counters and (b) four decade counters.

a. List the requirements of laboratory type signal generators. 

b. Write a note on sine-wave generator, square wave generator, pulse generator, function 

generator, and Lab VIEW.

c. Illustrate in detail IEEE488 Electrical Interface.

Find the following system are Linear or non-linear

1. Y(t)= X(t-2)+X(2-t)

2. Y(t)=t^2 X(t-1)

An FIR filter has an impulse response given by ℎ(𝑛)={2,1,2,1}. Find its response 𝑦(𝑛) to the input 𝑥(𝑛)={1,−2,4}. Assume that both 𝑥(𝑛) and ℎ(𝑛) start at 𝑛=0.

Find the auto-correlation of 𝑥(𝑛)={2 5 −4}.

↑

Find the cross-correlation of the sequences:

𝑥(𝑛)={3 5 1 2} and ℎ(𝑛)={1 4 3}

↑ ↑

Find the regular convolution of the following sequences using tabular method:

𝑥(𝑛)={3 −2 1 4} and ℎ(𝑛)={2 5 3}

↑ ↑