Question
Why does microwave oven heats up a food item containing water molecules most efficiently?
✓
Answer
The microwave oven heats up the food items containing water molecules most efficiently because the frequency of microwaves matches the resonant frequency of water molecules.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A beam of light consisting of two wavelengths $, 4000 \mathring A$ and $6000 \mathring A ,$ is used to obtain interference fringes in a Young’s double $-$ slit experiment. What is the least distance from the central maximum where the dark fringe is obtained?
→Derive the formula of magnetic field for a current carrying infinite wire using Ampere's circuital law and discuss its interesting cases.
In the given figure, the curved portion is a semi-circle and the straight wires are long. Find the magnetic field at point O.
Define the distance of closest approach.
(a) An em wave is travelling in a medium with a velocity $\vec{v}=v\hat{i}$. Draw a sketch showing the propagation of the em wave, indicating the direction of oscillating electric and magnetic fields. (b) How are the magnitudes of the electric and magnetic fields related to the velocity of em wave.
→If the total mechanical energy of a particle is zero, is its linear momentum necessarily zero? Is it necessarily non-zero?
In Young's double-slit experiment using monochromatic light of wavelength 2, the intensity of light at a point on the screen where path difference is λ, is K units. What is the intensity of light at a point where path difference is λ/3?
What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5.)
If water in one flask and castor oil in other are violently shaken and kept on a table, which will come to rest earlier?
In Exercises 7.3 and 7.4, what is the net power absorbed by each circuit over a complete cycle. Explain your answer.