The condition under which a microwave oven heats up a food item containing water molecules most efficiently is

  • A
    The frequency of the microwaves has no relation with the natural frequency of water molecules.
  • B
    Microwaves are heat waves,so they always produce heating.
  • C
    Infra-red waves produce heating in a microwave oven.
  • D
    The frequency of the microwaves must match the resonant frequency of the water molecules.

Explore More

Similar Questions

The electric field in an electromagnetic wave is given by $E = 56.5 \sin \omega(t - x/c) \; NC^{-1}$. Find the intensity of the wave if it is propagating along the $x$-axis in free space. (Given $\varepsilon_{0} = 8.85 \times 10^{-12} \; C^{2} N^{-1} m^{-2}$ and $c = 3 \times 10^{8} \; m/s$)

The electric and the magnetic field,associated with an electromagnetic wave propagating along the $+z$-axis,can be represented by

The nature of electromagnetic wave is

In electromagnetic waves,the average energy density is associated with what?

The average value of electric energy density in an electromagnetic wave is. [where $E_0$ is peak value]

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo