Integrating factor of differential equation cos x dy/dx + y sin x = 1 is
If p & q are roots of x2+px+q=0 then
For a differential function f(x) to have maximum, df/dx & d2f/dx2 should be
The primary task of a microprocessor based controller is
A proportional controller with a gain of KC is used to control a first order process. The offset will increase if
The basic principle involved in the measurement of temperature by thermocouple is