Working Principle of an Oscilloscope

Manish Kumar Saini

Updated on 05-Jul-2021 08:38:48

An oscilloscope is a device which allows the amplitude of electrical signals (current, voltage, power etc.) to be display as a function of time.Oscilloscope Parts and their FunctionAn oscilloscope consists of following major parts (see the block diagram) −Cathode Ray Tube (CRT) – The CRT displays the quantity being measured. ... Read More

Working Principle and Types of Ohmmeter

Manish Kumar Saini

Updated on 05-Jul-2021 08:30:32

A device that can measure the resistance directly is known as an ohmmeter. There are two types of ohmmeters asSeries Types OhmmeterShunt Type OhmmeterSeries Type OhmmeterCircuit DiagramThe circuit of a series type ohmmeter consists of a D’Arsonval galvanometer (PMMC meter) connected in series with a resistance and a battery. It ... Read More

Mutual Inductance: Definition & Formula

Manish Kumar Saini

Updated on 05-Jul-2021 08:00:08

When the two coils are arranged in such a way that a change of current in one coil causes an emf to be induced in the other, the coils are said to have mutual inductance. The mutual inductance is denoted letter M and measured in Henry.Consider two coils, coil 1 ... Read More

What is Magnetomotive Force (MMF)?

Manish Kumar Saini

Updated on 05-Jul-2021 07:53:40

The Magnetomotive force (MMF) is defined as the work done in moving a unit magnetic pole once around the magnetic circuit. It is a magnetic pressure that tends to set up magnetic flux in a magnetic circuit. Mathematically, the mmf is the product of current and number of turns of ... Read More

Magnetic Field Intensity of an Electromagnet

Manish Kumar Saini

Updated on 05-Jul-2021 07:45:41

The magnetic field intensity is the force acting on a unit test north-pole (i.e., N-pole of 1 Wb) placed at a point in the magnetic field. It is denoted by H.The magnetic field intensity is a vector quantity, possessing both magnitude and direction.The magnetic field intensity is also known by ... Read More

Low Voltage (LV) Distribution System

Manish Kumar Saini

Updated on 05-Jul-2021 07:40:49

Distribution SystemThe distribution system is defined as the part of electrical power system which distributes electrical power for local use. On the basis of voltage level a distribution system can be classified in two categories viz.Low Voltage (LV) Distribution SystemHigh Voltage (HV) Distribution SystemLow Voltage (LV) Distribution SystemThe distribution system ... Read More

Instantaneous and Average Power Formula

Manish Kumar Saini

Updated on 05-Jul-2021 07:36:00

Single Phase SystemInstantaneous PowerThe instantaneous power in an AC circuit is defined as the product of instantaneous voltage (v) across the element and instantaneous current (i) through the element and is denoted by lower case letter p.Instantaneous Power, $\mathrm{p=v\times\:i}$Since, the values of instantaneous voltage and instantaneous current changes from instant ... Read More

How to Determine the Electric Motor Load?

Manish Kumar Saini

Updated on 05-Jul-2021 07:28:20

Electric motor load means the current drawn by an electric motor. It depends upon the load on the shaft of the motor. For a given electric motor, it can estimated using input power, amperage or speed of the motor. Most electric motors are designed to run at 50 % to ... Read More

How to Determine Magnetic Flux Density?

Manish Kumar Saini

Updated on 05-Jul-2021 07:23:57

The magnetic flux density is the measure of amount of magnetic flux in each square meter of the magnetic field. Therefore, the magnetic flux density is defined as the magnetic flux passing normally (at 90°) per unit area and is denoted by B, i.e., Magnetic flux density, $$B=\frac{\phi}{A}$$Where, Φ is ... Read More

How to Calculate the Capacitance of Different Types of Capacitors?

Manish Kumar Saini

Updated on 05-Jul-2021 06:58:37

Capacitance - DefinitionThe ability of a capacitor to store charge is known as its capacitance. In other word, the capacitance can also be defined as the property of a material by virtue of it opposes the any change in voltage applied across it.Capacitance: FormulaExperimentally, it has been found that, the ... Read More