Class 12PhysicsElectromagnetic WavesMaxwell's equations , Concept of displacement current and Hertz experiment
MediumWhat is the effect of displacement current?
(N/A) The displacement current allows the laws of electric and magnetic fields to be represented more symmetrically.
Faraday's law of electromagnetic induction states that a time-varying magnetic field produces an electric field.
Maxwell's modification to Ampere's law (the Ampere-Maxwell law) states that a time-varying electric field (represented by displacement current) produces a magnetic field.
Thus,electric and magnetic fields changing with time produce each other.
This symmetry in the laws of electromagnetism leads to the prediction of the existence of electromagnetic waves,which propagate through space as self-sustaining oscillations of electric and magnetic fields.
Faraday's law of electromagnetic induction states that a time-varying magnetic field produces an electric field.
Maxwell's modification to Ampere's law (the Ampere-Maxwell law) states that a time-varying electric field (represented by displacement current) produces a magnetic field.
Thus,electric and magnetic fields changing with time produce each other.
This symmetry in the laws of electromagnetism leads to the prediction of the existence of electromagnetic waves,which propagate through space as self-sustaining oscillations of electric and magnetic fields.
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Similar Questions
What did Hertz observe in his experiment to produce electromagnetic waves?
Easy
View SolutionWhich of the following statements is true for displacement current?
Easy
View Solution$A$ time-varying potential difference is applied between the plates of a parallel plate capacitor of capacitance $2.5 \mu \text{F}$. The dielectric constant of the medium between the capacitor plates is $1$. It produces an instantaneous displacement current of $0.25 \text{ mA}$ in the intervening space between the capacitor plates. The magnitude of the rate of change of the potential difference will be . . . . . . $\text{V s}^{-1}$.
To establish an instantaneous displacement current of $2\,A$ in the space between two parallel plates of a $1\,\mu F$ capacitor,the potential difference across the capacitor plates will have to be changed at the rate of:
Difficult
View SolutionThe source of a time-varying magnetic field may be:
$(A)$ $A$ permanent magnet
$(B)$ An electric field changing linearly with time
$(C)$ Direct current
$(D)$ $A$ decelerating charged particle
$(E)$ An antenna fed with a digital signal
Choose the correct answer from the options given below:
$(A)$ $A$ permanent magnet
$(B)$ An electric field changing linearly with time
$(C)$ Direct current
$(D)$ $A$ decelerating charged particle
$(E)$ An antenna fed with a digital signal
Choose the correct answer from the options given below:
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