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Identify the type of modulation where the frequency of the modulated wave is equal to that of the carrier wave.
- a)Frequency modulation
- b)Amplitude modulation
- c)Carrier modulation
- d)Phase modulation
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Identify the type of modulation where the frequency of the modulated w...
Amplitude Modulation (AM)
Amplitude modulation is a type of modulation in which the amplitude of the carrier wave is varied in proportion to the waveform being transmitted. However, in AM modulation, the frequency of the modulated wave is not equal to that of the carrier wave.
Frequency Modulation (FM)
Frequency modulation is a type of modulation in which the frequency of the carrier wave is varied in proportion to the waveform being transmitted. FM modulation is not the correct answer to this question.
Carrier Modulation
Carrier modulation is not a commonly used term in modulation techniques. It does not accurately describe any specific modulation technique.
Phase Modulation (PM)
Phase modulation is a type of modulation in which the phase of the carrier wave is varied in proportion to the waveform being transmitted. Similar to frequency modulation, the frequency of the modulated wave is not equal to that of the carrier wave in PM modulation.
Correct Answer: Amplitude Modulation (AM)
Amplitude modulation is the correct answer to this question. In AM, the frequency of the modulated wave is equal to that of the carrier wave. The modulating signal is used to vary the amplitude of the carrier wave, resulting in the modulation of the signal. The frequency of the carrier wave remains constant throughout the modulation process.
During AM modulation, the amplitude of the carrier wave is varied based on the instantaneous amplitude of the modulating signal. This variation in amplitude carries the information of the modulating signal.
In AM modulation, the modulated wave can be expressed as:
\[A_c \cdot (1 + k_a \cdot m(t)) \cdot \cos(2\pi f_c t)\]
Where:
- \(A_c\) is the amplitude of the carrier wave
- \(k_a\) is the amplitude sensitivity or modulation index
- \(m(t)\) is the modulating signal
- \(f_c\) is the frequency of the carrier wave
- \(\cos(2\pi f_c t)\) is the carrier wave
As we can see from the equation, the frequency term \(f_c\) remains constant, indicating that the frequency of the modulated wave is equal to the frequency of the carrier wave.
Therefore, the correct answer is option 'B': Amplitude modulation.
Amplitude modulation is a type of modulation in which the amplitude of the carrier wave is varied in proportion to the waveform being transmitted. However, in AM modulation, the frequency of the modulated wave is not equal to that of the carrier wave.
Frequency Modulation (FM)
Frequency modulation is a type of modulation in which the frequency of the carrier wave is varied in proportion to the waveform being transmitted. FM modulation is not the correct answer to this question.
Carrier Modulation
Carrier modulation is not a commonly used term in modulation techniques. It does not accurately describe any specific modulation technique.
Phase Modulation (PM)
Phase modulation is a type of modulation in which the phase of the carrier wave is varied in proportion to the waveform being transmitted. Similar to frequency modulation, the frequency of the modulated wave is not equal to that of the carrier wave in PM modulation.
Correct Answer: Amplitude Modulation (AM)
Amplitude modulation is the correct answer to this question. In AM, the frequency of the modulated wave is equal to that of the carrier wave. The modulating signal is used to vary the amplitude of the carrier wave, resulting in the modulation of the signal. The frequency of the carrier wave remains constant throughout the modulation process.
During AM modulation, the amplitude of the carrier wave is varied based on the instantaneous amplitude of the modulating signal. This variation in amplitude carries the information of the modulating signal.
In AM modulation, the modulated wave can be expressed as:
\[A_c \cdot (1 + k_a \cdot m(t)) \cdot \cos(2\pi f_c t)\]
Where:
- \(A_c\) is the amplitude of the carrier wave
- \(k_a\) is the amplitude sensitivity or modulation index
- \(m(t)\) is the modulating signal
- \(f_c\) is the frequency of the carrier wave
- \(\cos(2\pi f_c t)\) is the carrier wave
As we can see from the equation, the frequency term \(f_c\) remains constant, indicating that the frequency of the modulated wave is equal to the frequency of the carrier wave.
Therefore, the correct answer is option 'B': Amplitude modulation.
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Identify the type of modulation where the frequency of the modulated w...
In Amplitude modulation, the modulating wave is superimposed on a high-frequency carrier wave such that the amplitude of the modulated wave varies as the amplitude of the modulating wave.
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Identify the type of modulation where the frequency of the modulated wave is equal to that of the carrier wave.a)Frequency modulationb)Amplitude modulationc)Carrier modulationd)Phase modulationCorrect answer is option 'B'. Can you explain this answer?
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