Question:medium

The electric field of an electromagnetic wave propagating in the positive \(z\)-direction is given by : \[ \vec{E}=\hat{a}_x \sin(\omega t-\beta z)+\hat{a}_y \sin\left(\omega t-\beta z+\frac{\pi}{2}\right) \] The wave is :

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Conditions for circular polarization:
• Equal amplitudes
• Phase difference \(=\pm90^\circ\) Sign of phase difference determines: \[ \text{LHCP or RHCP} \]

Updated On: May 22, 2026

Linearly polarized in \(z\)-direction
Elliptically polarized
Left-hand circularly polarized
Right-hand circularly polarized

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The Correct Option is C

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Top Questions on communication systems

The percentage of the total power carried by the sidebands of the AM wave for tone modulation when the modulation index is 0.3 is:
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Match List-I with List-II:

List-I (Modulation Schemes)	List-II (Wave Expressions)
(A) Amplitude Modulation	(I) \( x(t) = A\cos(\omega_c t + k m(t)) \)
(B) Phase Modulation	(II) \( x(t) = A\cos(\omega_c t + k \int m(t)dt) \)
(C) Frequency Modulation	(III) \( x(t) = A + m(t)\cos(\omega_c t) \)
(D) DSB-SC Modulation	(IV) \( x(t) = m(t)\cos(\omega_c t) \)

Choose the correct answer:

CUET (PG) - 2025
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