Advertisements
Advertisements
Question
Write down the integral form of modified Ampere’s circuital law.
Solution
This law relates the magnetic field around any closed path to the conduction current and displacement current through that path.
`oint vec"B" * "d"vec"l" = mu_0 "I"_"enclosed" + Mu_0epsilon_0 int vec"E" * "d"vec"A"` (Ampere - Maxwell's law)
APPEARS IN
RELATED QUESTIONS
An em wave exerts pressure on the surface on which it is incident. Justify.
About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation
(a) at a distance of 1 m from the bulb?
(b) at a distance of 10 m?
Assume that the radiation is emitted isotropically and neglect reflection.
In the study of a photoelectric effect the graph between the stopping potential V and frequency v of the incident radiation on two different metals P and Q is shown below:
(i) Which one of the two metals has higher threshold frequency?
(ii) Determine the work function of the metal which has greater value.
(iii) Find the maximum kinetic energy of electron emitted by light of frequency 8 × 1014 Hz for this metal.
Do electromagnetic waves carry energy and momentum ?
What is displacement current?
Write down Maxwell equations in integral form.
A man standing on the road has to hold his umbrella at 30° with the vertical to keep the rain away. He throws away the umbrella and starts, running at 10 km/h and finds raindrops hitting his head vertically. The speed of the raindrops with respect to the road is ______.
A charged particle oscillates about its mean equilibrium position with a frequency of 109 Hz. The electromagnetic waves produced ______.
- will have frequency of 109 Hz.
- will have frequency of 2 × 109 Hz.
- will have a wavelength of 0.3 m.
- fall in the region of radiowaves.
Even though an electric field E exerts a force qE on a charged particle yet the electric field of an EM wave does not contribute to the radiation pressure (but transfers energy). Explain.
Which of the following statement is NOT true about the properties of electromagnetic waves?
