Two Sinusoidal Signals Have the Same Amplitude (A) and the Same

question 326

Multiple Choice

Two sinusoidal signals have the same amplitude (A) and the same frequency (f) . They differ in phase by 180 degrees. If these two signals are added together, the result is a sinusoidal signal having an amplitude of:

• A) Zero
• B) 0.707A and a frequency of f
• C) A and a frequency of 2f
• D) 2A and a frequency of f
• E) 2A and a frequency of 2f

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