Q- Why Phase tester is only used for checking AC not DC ?

Q- In the process of checking AC through Phase Tester our body is the part of circuit but we don't recevie Shock, Why ?

Q- What are the application in which PNP transistor is preferred over NPN ?

Q- Ordinary Water Tap is which kind of controller ? P , PI or PID i chose the option of ON - OFF type controller but ambiguity is that for different positioning of tap we get different flow

Q- Which of the following is Close loop system - a-)respiratory System b-)traffic light system c-)washing machine d-)Room heater my option is A, what is our take on option B & C

Sail,

Q- Control problem are mainly classified in _____ types. a-)4 b-)3 c-)6 d-)nono of these Few of them i know is 1- regulator type problem (eg- Air conditioner) 2- tracking problem (eg missile trcking problem) 3- sybernatics 4- optimal control problem

Sail,

Q- voltage source of 12v is driving the circuit.if circut draw the current of 0.5A them source voltage will became 11.8v.what is the power dilevered by source when circuit draw 5A current ?

Ecil,

Why Current(Ampere) is chosen as Fundamental Quanties not Charge(coulomb) ?