Question

What is the total voltage, when two noise voltage V1 and V2 are combined?

(a) \(\sqrt{V_1 \times V_1 + V_2 \times V_2}\)

(b) \(\frac{V_1 + V_2}{2}\)

(c) \(\sqrt{V_1 \times V_2}\)

(d) V1 + V2

The question was asked in a national level competition.

The question is from Intersymbol Interference in division Baseband Data Transmission of Analog Communications

Answer 1

Right option is (a) \(\sqrt{V_1 \times V_1 + V_2 \times V_2}\)

The explanation: When two noise voltage V1 and V2 are combined, the resulting total voltage VT comes out to be \(\sqrt{V_1 \times V_1 + V_2 \times V_2}\).