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

Question:

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

Options :

a) Infra-red waves produce heating in a microwave oven
b) The frequency of the microwaves must match the resonant frequency of the water molecules
c) The frequency of the microwaves has no relation with natural frequency of water molecules
d) Microwaves are heat waves, so always produce heating

Answer :

b) The frequency of the microwaves must match the resonant frequency of the water molecules

Answer Steps :

Video Tutorial

Related Questions

An alternating voltage source is connected in series with a resistance R and an inductance L. If the potential drop across the resistance is 200 V and across the inductance is 150 V, then the applied voltage is:

A 1 µF condenser is charged to 50 V. The charging battery is then disconnected and a 10 mH coil is connected across the capacitor so that LC oscillations occur. What is the maximum current in the coil ? Assume that the circuit contains no resistance. The capacity of a pure capacitor is 1 F. In d.c. circuits, its effective resistance will be

In an a. c. circuit the instantaneous current and e.m.f. are represented as: I = I0 sin(ωt – π/6) and E = E0 sin(ωt + π /3) respectively. The voltage leads the current by

Explore Our Courses