The triode constant is out of the following

A wave moves ar a constant speed along a stretched string.Mark the incorrect statement out of the following:

A wave moves ar a constant speed along a stretched string.Mark the incorrect statement out of the following:

A planet is revolving around the sun in an elliptical orbit. Which out of the following remains constant.

A horizontal pipe of shown cross - section has a liquid flowing through it and follows Bernouli's theorem . Which of the following is/are constant through out pipe ?

A horizontal pipe of shown cross - section has a liquid flowing through it and follows Bernouli's theorem . Which of the following is/are constant through out pipe ?

The amplification factor of a triode is 20. If the grid potential is reduced by 0.2 volt then to keep the plate current constant its plate voltage is to be increased by