Question

1. the output signal of a function generator is fm modulated by changing the

a shape of the square wave

b shape of the triangle wave

c amplitude of the output signal

d frequency of the output signal

Explanation:

FM (Frequency - Modulation) involves varying the frequency of the carrier signal according to the message signal. Changing the shape of a square or triangle wave doesn't directly relate to FM. Changing the amplitude is related to AM (Amplitude - Modulation). In FM, the key parameter is the frequency of the output signal.

Answer:

d. frequency of the output signal