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Krishna S.
Teacher at an NGO, Student at BITS Pilani
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MATLAB
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Question:

Convolute two identical rectangular pulses? 1- Write a function rect(t) 2- Write a program to find two convolution of two identical rectangular pulses which are defined in the interval [-0.5 ,0.5 ] 3- plot both input and output

Krishna S.

The following is code for the above question, comments are included for better understanding of question. function [ ] = task1aks( ) %function for rectangle function [ n ] = rectangle( t ) n=zeros(1,size(t,2)); for i=1:length(t) n(i)=0; if (t(i)>=-0.5) && (t(i)<=0.5) n(i)=1; end end end %initial values fs=100; t=-5:1/fs:5; x=rectangle(t); %convoluting things y=conv(x,x,'same')/fs; figure subplot(2,1,1); plot(t,x); title('Input_value'); subplot(2,1,2); plot(t,y); title('Output_value'); end

Java Programming
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Question:

how to find out the middle element in a linked list in a single pass(in one loop through the list)?

Krishna S.

Electrical Engineering
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Question:

Why is only sine wave used to represent electrical waves in equations, not square or cosineor other forms of waves?

Krishna S.

It is not by choice that we use sine wave as the standard form. It is also not because sine wave has a maximum minimum and as such a large rms value. Rms value for cosine and ramp waves is also same, but we don't use them, because in the power generation, emf induced produces current in sine wave form only.It is the simplest way we can produce current.

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