Q21. In a JFET, drain current is primarily controlled by,

Q22. Magnetic amplifiers are used for

Q23. In push pull amplifier there occurs cancellation

Q24. The maximum efficiency of class B amplifier

Q25. Class AB amplifier is often used in power(large signal) amplifiers in order to

Q26. The lower critical frequency of a direct-coupled amplifier with no bypass capacitor is

Q27. Which of the following is not a characteristic of an ideal Op amp?

Q28. The ideal Op amp has the following characteristics.

Q29. Current cannot flow to the ground through

Q30. In the operational transconductance amplifier, the transconductance is controlled by