Physics Alternating Current PMDC Conceptual Practice
PMDC Verified Question 14 of 127
In consumer microwave ovens, what is used to heat the food?
A
X-rays
B
Beta rays
C
Electromagnetic rays (Microwaves)
D
Gamma rays
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Electromagnetic rays (Microwaves)
Concept:

This question covers the practical application of different bands of the electromagnetic spectrum.

Solution:

Microwave ovens heat food using microwaves, which are high-frequency electromagnetic waves. These waves are absorbed by polar molecules (such as water, fats, and sugars) in the food. This absorption causes the molecules to rotate rapidly, generating heat through molecular friction.

Why other options are incorrect:

  • X-rays and Gamma rays are forms of ionizing radiation that would damage the molecular structure of the food and pose severe safety hazards.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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