## Transformer MCQs

Transformers are the device which is capable of receiving AC power at one voltage and delivering it at another voltage. In this way  transformer help in achieve better transmission efficiency, while transferring the power over longer distances with high voltages,In this article include transformer MCQs ...Read More

## What is Magnetic flux?

What is Magnetic flux?It is defined as the number of magnetic field lines which pass through the close surface. It is the total magnetic field passing through the surface area. The area of magnetic field which will consider can be of any size and ...Read More

## What is Magnetism?

What is Magnetism?A magnetism is a phenomenon which is related to the magnetic field, which arise from the motion of electric charges and due to this motion field produced which attract or repel other objects. A magnet (from Greek magnetization stone) is a material ...Read More

## What is Wheatstone Bridge?

What is Wheatstone Bridge?The  bridge was first developed by Samul Hunter Charlie in 1833and it is popularized Chalie Wheatstone in 1843 .It is used for measuring accurately the value of an unknown resistance. Although today the digital multimeter is used to measure the resistance ...Read More

## Kirchoff’s Voltage law

Kirchoff’s voltage law is about the EMF and voltage in a closed circuit or a closed loop and may be stated as under “In any closed electrical circuit the algebraic sum of all the electromotive force(e.m.f) and voltage drop in a resistor is equal ...Read More

## Kirchoff’s current law

Kirchoff’s current law is related to the current at the junctions of an electric circuit and maybe state as under “The sum of all currents meeting at a Junction in an electric circuit is zero  ∑I=0 “  A junction is a point in a ...Read More

## What is Kirchoff’s laws?

What is Kirchoff’s Laws?Sometime we face a circuits where simplification by series and parallel combination are not possible and also ohm’s law can not applied to solve such circuits. This happen when there is more than one EMF in the circuit or when  resistor ...Read More

## What is Thermistor?

What is Thermistor?A resistor made of semiconductors having resistance that varies rapidly and predictably with temperature  is known as  thermistor . It (short for thermal resistor) is heat sensitive device usually made of a semiconductor material whose resistance changes very rapidly with change of ...Read More

## What is Rheostats?

What is Rheostats? Rheostats is an instrument which is used to control the electrical current in a circuit by varying the circuit resistance. To use the variable resistor as a current controlled device one of the two fixed terminals say A and B ,and ...Read More

## Potential divider

Potential divider provide a convenient way of getting a variable PD (potential difference)from a  fixed potential difference .With the help of the battery a potential difference V is applied across the end A and B of the resistor.Let R be the resistance of the ...Read More