Define Electromagnetic Waves
According to Maxwell, an accelerated charge is a source of electromagnetic radiation. In an electromagnetic wave, electric and magnetic field vectors are at right angles…
Physics
Characteristics of Electromagnetic Waves
Electromagnetic waves consist of oscillating electrical and magnetic fields, acting perpendicular to each other. Dissimilar ranges of electromagnetic waves can be classified according to their…
Define and Describe on Electromagnetic Spectrum
After the demonstration of electromagnetic waves by Hertz, electromagnetic waves in different regions of wavelength were produced by different ways of excitation. Fig: Electromagnetic spectrum…
Describe Working Procedure of Choke Coil
A choke coil is an inductance coil of very small resistance used for controlling current in an a.c. circuit. It is a part used in…
Explain with Equation: Power in an AC Circuit
In an a.c circuit the current and emf vary continuously with time. Therefore power at a given instant of time is calculated and then its…
What is Choke Coil?
A choke coil is an inductance coil of very small resistance used for controlling current in an a.c. circuit. If a resistance is used to…
Describe with Equation: Series Resonance or Voltage Resonance in RLC Circuit
Series resonance or voltage resonance in RLC circuit The value of current at any instant in a series RLC circuit is given by I =…
What is Acceptor Circuit?
The series resonant circuit is often called an ‘acceptor’ circuit. By offering minimum impedance to current at the resonant frequency it is able to select…
Experiment: AC Circuit with Resistor
Let an alternating source of emf be connected across a resistor of resistance R. The instantaneous value of the applied emf is e = E0…
Experiment: AC Circuit with a Capacitor
An alternating source of emf is connected across a capacitor of capacitance C (Figure: a). It is charged first in one direction and then in…
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