alleryA basic source of electromagnetic waves is which arrangement of charge?
AAn electric diploma
BAn electric dilemma
CAn electric dipole
DAn electric display
Answer & Solution
Correct answer: C. An electric dipole
1. Radiation needs charge that accelerates back and forth.
2. The simplest such arrangement has two opposite charges.
3. An electric dipole is a basic source of electromagnetic waves.
4. So the answer is an electric dipole.
_Source: syllabus Physics Part I, Ch 8 'Electromagnetic Waves'_
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