In electromagnetic wave, according to Maxwell, changing electric field gives
Options
(a) stationary magnetic field (b) conduction current (c) eddy current (d) displacement current
Correct Answer:
displacement current
Explanation:
No explanation available. Be […]
Out of the following options which one can be used to produce a propagating electromagnetic wave?
Options
(a) A stationary charge (b) A chargeless particle (c) An accelerating charge (d) A charge moving […]
The wavelength of X-rays is in the range
Options
(a) 0.01 Å to 1Å (b) 0.001 nm to 1 nm (c) 0.001 μm to 1 μm (d) 0.001 cm to 1 cm
Correct […]
Which component of electromagnetic spectrum have maximum wavelength?
Options
(a) Radio waves (b) Visible Spectrum (c) Gamma rays (d) X- rays
Correct Answer:
Radio waves
Explanation:
No explanation available. Be the first to […]
The transverse nature of electromagnetic waves is proved by which of the following?
Options
(a) Interference phenomena (b) Diffraction phenomena (c) Dispersion phenomena (d) Polarisation phenomena
Correct Answer:
Polarisation phenomena
Explanation:
No explanation […]
The wavelength of the short radio waves, microwaves, ultraviolet waves are λ₁,λ₂ and λ₃ respectively. Arrange them in decreasing order.
Options
(a) λ₁,λ₂,λ₃ (b) λ₁,λ₃,λ₂ (c) λ₃,λ₂,λ₁ (d) λ₂,λ₁,λ₃
Correct Answer:
λ₁,λ₂,λ₃
Explanation: […]
The wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π(3×10⁶ x-9×10¹⁴ t) . The frequency of the wave is equal to
Options
(a) 4.5×10¹⁴ Hz (b) […]
The frequencies of X-rays,γ-rays and ultraviolet rays are respectively p,q and r, then
Options
(a) p greater than q,q greater than r (b) p less than q,q greater than r (c) p less than […]
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