The phenomenon of polarization cannot occur in: MCQ with Answer and Explanation

The phenomenon of polarization cannot occur in:
A. Sound waves
B. X-rays
C. Radio waves
D. Light waves
Answer: Option A
Solution (By JKSSB Mock Tests)
Polarization requires transverse waves (oscillations perpendicular to propagation). Light, radio waves, X-rays are electromagnetic transverse waves and can be polarized. Sound waves in air are longitudinal (oscillations parallel to propagation) and cannot be polarized. Memory tip: 'Polarization ⇒ transverse waves only; sound is longitudinal ⇒ no polarization'. This wave property question tests understanding of wave types, frequently examined in competitive exams. Always classify waves as transverse/longitudinal to determine polarization possibility; this is a common conceptual trap.

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The device that uses the principle of electromagnetic induction is
A. Resistor
B. Electric motor
C. Electric bulb
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Correct Answer: Option D


Explanation:
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Correct Answer: Option B


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Ultrasound frequencies are typically above
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Correct Answer: Option C


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