Question

In: Computer Science

in C++ Write a program to compute the current and the power dissipation in an AC...

in C++ Write a program to compute the current and the power dissipation in an AC circuit that has four resistors R1, R2, R3, and R4 in parallel. The voltage source is V. Test your solution with various voltage levels and resistor values. Execute and submit the program and the results in screen captures. Please note that the equivalent resistor is given by 1/Rtotal = 1/R1 + 1/R2 + 1/R3 + 1/R4 and the current I is given by I = V/Rtotal. The Power dissipation is given by P = V x I

B) Repeat the problem above when the resistors are connected in series.

Solutions

Expert Solution

Here i am writing the code in C++.

here for the Rtotal our logic will be like

first we take LCM of all denominator then compute the addtion .

so if we want calculation same like this 1/Rtotal=1/R1+1/R2+1/R3+1/R4 then we have to do fraction addition in program so that we will get numerator and denomintor both the value then we compute our power and current

for fraction addition

step 1

find a common denominator by finding the LCM of the denominators

step 2:

chaange the fractions to have the same denominator and add both of terms

step 3:

reduce the final fraction obtained into its simpler form by dividing both numerator and denominator by there largest common factor;

so these logic i will use for Rtotal calcuation in parallel circuit.

i am pasting my code here

#include<iostream>

#include<math.h>

using namespace std;

int gcd(int a,int b)   // finding GCD of number

{

    if(a==0)

    return b;

    return gcd(b%a,a);

}

void smallest(int &den3, int &n3) findinf lcm of two number

{

    int common_factor=gcd(n3,den3);

    den3=den3/common_factor;

    n3=n3/common_factor;

}

void add_frac(int n1,int den1,int n2, int den2, int &n3, int &den3) //adding two fraction

{

    den3=gcd(den1,den2);

    den3=(den1*den2)/den3;

    n3=(n1)*(den3/den1) +(n2)*(den3/den2);

    smallest(den3,n3);

}

int main()

{

    int choice;

    int r1,r2,r3,r4,n1=1,n2=1,r5,n3,r6,n4,n5,r7,total; // these all variable will use in program

    float req,v,p,i,temp,tem;

    while(1)

    {

        cout<<"Enter your choice:-"<<endl;

        cout<<"1 for Parallel"<<endl;

        cout<<"2 for Series"<<endl;

        cout<<"3 for Quit"<<endl;

        cin>>choice;

        switch(choice)

        {

            case 1:

            cout<<"Enter R1 value ";

            cin>>r1;

            cout<<"Enter R2 value ";

            cin>>r2;

            cout<<"Enter R3 value ";

            cin>>r3;

            cout<<"Enter R4 value ";

            cin>>r4;

            cout<<"Enter Voltage Value ";

            cin>>v;

            add_frac(n1,r1,n2,r2,n3,r5);   // first we add R1 and R2

            add_frac(n1,r3,n2,r4,n4,r6); // then we add R3 and R4

            add_frac(n3,r5,n4,r6,n5,r7); // then we will add summation of R1 or R2 and summation of R3 or R4

            temp=r7; // we will save denominator of Rtoal in temp

            tem=n5; // and numerator in tem then all are simple calculation

            req=temp/tem;

            i=v/req;

            p=v*i;

            cout<<"The current is "<<i<<endl;

            cout<<"The power is "<<p<<endl;

            break;

            case 2:

            cout<<"Enter R1 value ";

            cin>>r1;

            cout<<"Enter R2 value ";

            cin>>r2;

            cout<<"Enter R3 value ";

            cin>>r3;

            cout<<"Enter R4 value ";

            cin>>r4;

            cout<<"Enter Voltage Value ";

            cin>>v;

            total = r1+r2+r3+r4; // in series

            req=total;

            i=v/req;

            p=v*i;

            cout<<"The current is "<<i<<endl;

            cout<<"The power is "<<p<<endl;

            break;

            case 3:

            exit(0);

        }

    }

    return 0;

}


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