The velocity of electromagnetic radiation in a medium of permittivity ε₀
The velocity of electromagnetic radiation in a medium of permittivity ε₀ and permeability μ₀ is given by Options (a) √(ε₀…
7 years ago
Physics
The condition under which a microwave oven heats up a food item containing
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is Options (a)…
7 years ago
The electromagnetic waves detected using a thermopile and used in physical therapy
The electromagnetic waves detected using a thermopile and used in physical therapy are Options (a) gamma radiations (b) x-rays (c)…
7 years ago
In electromagnetic spectrum, the frequencies of γ-rays and x-rays and ultraviolet rays
In electromagnetic spectrum, the frequencies of γ-rays and x-rays and ultraviolet rays are denoted by n₁,n₂ and n₃ respectively, then…
7 years ago
A plane electromagnetic wave of frequency 20 MHz travels through a space along
A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at…
7 years ago
The speed of electromagnetic waves in vaccum is equal to
The speed of electromagnetic waves in vaccum is equal to Options (a) μ₀ε₀ (b) √(μ₀ε₀) (c) 1/√(μ₀ε₀) (d) 1/(μ₀ε₀) Correct…
7 years ago
A jar is filled with two non-mixing liquids 1 and 2 having densities
A jar is filled with two non-mixing liquids 1 and 2 having densities ρ₁ and ρ₂ respectively. A solid ball,…
7 years ago
In the given (V – T) diagram, what is the relation between pressure P₁ and P₂?
In the given (V - T) diagram, what is the relation between pressure P₁ and P₂? Options (a) P₂ >…
7 years ago
At what temperature will the rms speed of air molecules be double that of NTP?
At what temperature will the rms speed of air molecules be double that of NTP? Options (a) 519⁰C (b) 619⁰C…
7 years ago
Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units
Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units respectively. The rms…
7 years ago