Electronic Devices and Circuits - ECE Questions and Answers

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Answer : Option D

Explanation :

Hartely oscillator

The Hartley oscillator is an electronic circuit in which the oscillator frequency is determined by an tuned circuit consists of capacitors & Inductors i.e LC oscillator. In Hartley oscillator the tuned circuit consists of a single capacitor in parallel with two inductors in series & feedback for the active device is taken from the center connection of the two inductors

The below circuit is known as _______

LC Tank Circuit

JFET R C Phase shift oscillator

colpitts oscillator

Wein bridge oscillator

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Answer : Option D

Explanation :

Wein bridge oscillator

The Wien Bridge Oscillator is so called because the circuit is based on a frequency-selective form of the Whetstone bridge circuit. The Wien Bridge Oscillator is a two-stage RC coupled amplifier circuit that has good stability at its resonant frequency

The below circuit is known as ___________

Resonant circuit oscillator

JFET R C Phase shift oscillator

colpitts oscillator

Wein bridge oscillator

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The below circuit is known as _________

Resonant circuit oscillator

Crystal Oscillator

colpitts oscillator

Wein bridge oscillator

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Which of the following expressions represents the correct distribution of the electrons in the conduction band? (gc(E)=density of quantum states, fF(E)=Fermi Dirac probability

n(E)=gc(E)*fF(E)

n(E)=gc(-E)*fF(E)

n(E)=gc(E)*fF(-E)

n(E)= gc(-E)*fF(-E)