Maths & Physics Teacher
Maths & Physics Teacher Interview Questions and Answers

Asked in Exicom Tele Systems

Q. What is a rectifier?
A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).
Rectifiers are commonly used in power supplies to convert AC voltage from a wall outlet to DC voltage for electronic devices.
There are different types of rectifiers such as half-wave rectifiers, full-wave rectifiers, and bridge rectifiers.
Rectifiers typically consist of diodes that allow current to flow in only one direction, effectively converting AC to DC.
Examples of rectifiers...read more
Asked in Neogeoinfo Technologies

Q. What is a transistor?
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.
Transistors have three terminals: emitter, base, and collector.
They can be used in amplifiers, oscillators, and digital circuits.
Common types of transistors include bipolar junction transistors (BJTs) and field-effect transistors (FETs).

Asked in Varahi Technologies

Q. What is velocity?
Velocity is the rate of change of an object's position with respect to time, including both speed and direction.
Velocity is a vector quantity, meaning it has both magnitude and direction.
It is calculated as the displacement of an object divided by the time taken to cover that displacement.
Velocity can be positive, negative, or zero depending on the direction of motion.
For example, a car moving east at 60 km/h has a velocity of +60 km/h in the east direction.


Q. What is the value of sin(36 degrees)?
The value of sin(36°) is approximately 0.5878, derived from geometric properties of a pentagon.
Sin(36°) can be calculated using the sine function on a calculator.
It is approximately equal to 0.5878.
In a regular pentagon, the angles are related to sin(36°).
Using the half-angle formula: sin(36°) = √((1 - cos(72°))/2).
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