In the example, Vo equals 2xV2 or 2xV1. Which option reflects this statement?

In the example, Vo equals 2xV2 or 2xV1. Which option reflects this statement?

• A. Vo equals V2 − V1
• B. Vo equals 2×V2 or 2×V1
• C. Vo equals V2 + V1
• D. Vo equals 0

Answer: (B)

The situation tests a gain of two: the output is twice the input signal. Vo = 2 × V2 or 2 × V1 shows exactly that, doubling whichever input is applied. That’s why this option best reflects the statement. The other forms imply different relationships: Vo = V2 − V1 would be a difference, Vo = V2 + V1 would be a sum, and Vo = 0 would give no output. So the one with a factor of two on the input is the correct way to express Vo being doubled.

The situation tests a gain of two: the output is twice the input signal. Vo = 2 × V2 or 2 × V1 shows exactly that, doubling whichever input is applied. That’s why this option best reflects the statement. The other forms imply different relationships: Vo = V2 − V1 would be a difference, Vo = V2 + V1 would be a sum, and Vo = 0 would give no output. So the one with a factor of two on the input is the correct way to express Vo being doubled.