Exam 7: Electrical Engineering on Capacitance, Amplifiers, and Switching Regulators

The diode in a half wave rectifier has a forward resistance RF. The voltage is Vmsin?t and the load resistance is RL. The DC current is given by                    

Given that capacitance w.r.t the input node is 2pF and output node is 4pF, find capacitance between input and output node.

Which of the statement is incorrect?

A series switching regulators

Filter used in switching regulator's are also as called

What is the phase shift in RC coupled CE amplifier at lower 3dB frequency?

Which is the most commonly used low voltage switching regulators?

The switching regulators can operate in

Switching speed of P+ junction depends on                    

The technique used to quickly switch off a transistor is by                   

The collector current will not reach the steady state value instantaneously because of                   

Which of the following helps in reducing the switching time of a transistor?

Which of the following is considered to be the most important components of the switching regulator?

For the BJT, ?=?, VBEon=0.7V VCEsat=0.7V. The switch is initially closed. At t=0, it is opened. At which time the BJT leaves the active region?

Consider an RC coupled amplifier at low frequency. Internal voltage gain is -120. Find the voltage gain magnitude, when given that collector resistance = 1k?, load = 9k?, collector capacitance is 0. is 0.1?F, and input frequency is 20Hz.

Fixed voltage regulators and adjustable regulators are often called as

Linear series regulators are suited for application with

The time taken for a transistor to turn from saturation to cut off is                    

Find the 3-dB frequency given that the gain of RC coupled amplifier is 150, the low frequency voltage gain is 100 and the input frequency is 50Hz.

Which among the following act as a switch in switching regulator?