Physics (General Knowledge)
| Description: microphone, oscillator,tv, telephone frequency | |
| Number of Questions: 25 | |
| Created by: Karuna Seth | |
| Tags: microphone oscillator tv telephone frequency Physics Branches of Science Chemistry General Science and Scientific Terminology General Science & Scientific Terminology Scientific Terminologies Science General Science |
The addition of pentavalent impurity to a semiconductor creates ______.
In a semi conductor, the energy gap between valence band and conduction band is _______.
The maximum efficiency of full wave rectifier is _______.
In a full wave rectifier, if the input frequency is 50 Hz, the output frequency is ______.
Which of the following is the fastest switching device?
Three cascaded stages have gains of 10, 20 and 25. The overall gain will be _______.
A zener diode is used as a ________.
A PNP transistor is made of ______.
In super heterodyne radio receiver, the mixer stage produces an intermediate frequency of _______.
With the rise in temperature of a P-N junction, which of the following increases?
A triac is like a ______.
R.C. coupling is used for amplification of _______.
A thyristor is often used in
The calibration signal, usually available from a CRO, is of
Which of the following is the most stable oscillator?
Which class of amplifiers has the least distortion?
The third harmonic of 300 Hz is _______.
A pulse transformer uses _______.
In which of the following microphone backgrounds is noise present?
What should be the oscillator frequency for tuning in 710 KHz on an AM radio with a 455 KHz IP?
In a TV system _________.
In a telephone, the dial tone has a frequency of _______.
A device that converts from decimal number to a binary number is called _______.
To join a thin shaft with gear, a _____ is used.
Which logic gate is similar to the function of two series switches?