Computer Science Engineering Question ..

This is a turning ON method but it may lead to destruction of SCR and so it must be avoided. Va Forward Breakover Voltage ort a 191 192 193 Gate Current When SCR is forward biased, junction J1 and J3 are forward biased and junction J2 isreversed biased So it behaves as if an insulator is place between two conducting plate. Here Jland J3 acts as a conducting plate and J2 acts as an insulator. J2 is known as junction capacitor. So if we increase the rate of change of forward voltage instead of increasing the magnitude ofvoltage. Junction J2 breaks and starts conducting. A high value of changing current maydamage the SCR. SO SCR may be protected from high . (a, b) (az, bz) L LY Distance (x,y) 3 LA (az, bz) (a, b) Distance GRAPH OF MINIMAX LOCATION PROBLEM EXAMPLE In a foundry there are seven shops whose coordinates are summarized in the following table. The company is interested in locating a new costly fire fighting equipment in the foundry determine the minimax location of the new equipment SL NO EXISTING FACILITIES OF 1 2 3 4 5 Sand plant Molding shop Pattern shop Melting shop Felting shop Fabrication shop Annealing shop CO-ORDINATE CENTROID 10,20 30,40 10,120 10,60 30,100 30,140 20,190 6 7 SOLUTION The movement of new equipment is constrained within in the foundry the assumption of rectilinear distance more appropriate The co ordinate of the centroid of the existing shops are (a4,64)=(10,60) (a5,65)=(30,100) (a1.b1)=(10,20) (a2,b2)=(30,40) (a3,63)=(10,120) (a6,b6)=(30,140) (a7,b7)=(20,140) At normal operating condition gto carries a steady state current.The turn off process starts as soon as negative current is applied after t=0. la. Va Va=Vs va ia -Spike voltage Tail current ig+ ta t=0 -Gate current Igp Find the number of years and days) Write a program that prompts the user to enter the minutes (e.g., 1 billion), and displays the number of years and days for the minutes. For simplicity, assume a year has 365 days. Here is a sample run: Enter the number of minutes: 1000000000 1000000000 minutes is approximately 1902 years and 214 days in python }