Exams › GATE › Technical

The signal cos ω_ct + 0.5 cos ω_mt sin ω_ct is

1. FM only
2. AM only
3. both AM and FM
4. neither AM nor FM

Correct answer: AM only

Solution

The given signal contains a term that modulates the amplitude of the carrier wave (cos ω_ct) with another cosine function, which is characteristic of Amplitude Modulation (AM). The presence of the sine function does not contribute to frequency modulation (FM), confirming that the signal is AM only.

Related GATE Technical questions

• Which of the following is NOT associated with a p-n junction?
• Which of the following is true?
• For static electric and magnetic fields in an inhomogeneous source-free medium, which of the following represents the correct form of two of Maxwell’s equations?
• For the circuit shown in the following figure, transistors M1 and M2 are identical NMOS transistors. Assume that M2 is in saturation and the output is unloaded. The current Ix is related to Ibias as
• For the circuit shown in the figure, D has a transition from 0 to 1 after CLK changes from 1 to 0. Assume gate delays to be negligible. Which of the following statements is true?
• A rectangular waveguide of internal dimensions (a = 4 cm and b = 3 cm) is to be operated in TE11 mode. The minimum operating frequency is

⚔️ Practice GATE Technical free + battle 1v1 →