Advertisements
Advertisements
प्रश्न
Which of the following is an electromagnetic wave?
विकल्प
α - rays
β - rays
γ - rays
all of them
उत्तर
γ - rays
APPEARS IN
संबंधित प्रश्न
Suppose that the electric field amplitude of an electromagnetic wave is E0 = 120 N/C and that its frequency is v = 50.0 MHz.
- Determine B0, ω, k, and λ.
- Find expressions for E and B.
Identify the electromagnetic waves whose wavelengths vary as:
(a) 10–12 m < λ < 10–8 m
(b) 10–3 m < λ < 10–1 m
Write one use for each.
A capacitor is connected to an alternating-current source. Is there a magnetic field between the plates?
An electromagnetic wave going through vacuum is described by
E = E0 sin (kx − ωt); B = B0 sin (kx − ωt).
Which of the following equations is true?
Consider an oscillator which has a charged particle oscillating about its mean position with a frequency of 300 MHz. The wavelength of electromagnetic waves produced by this oscillator is ______.
A transmitter consists of LC circuit with an inductance of 1 μH and a capacitance of 1 μF. What is the wavelength of the electromagnetic waves it emits?
If the relative permeability and relative permittivity of the medium is 1.0 and 2.25, respectively. Find the speed of the electromagnetic wave in this medium.
The electric field of a plane electromagnetic wave travelling in +ve z-direction is described by ______.
For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric (Ue) and magnetic (Um) fields is ______.
An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave in that medium will be ______ × 10-2 cm.