Question

One sine wave has a positive peak at 75⁰, and another has a positive peak at 100⁰. How much is second sine wave shifted in phase from the 0⁰ reference?

(a) lags reference angle by 15⁰

(b) leads reference angle by 15⁰

(c) lags reference angle by 10⁰

(d) leads reference angle by 10⁰

This question was posed to me in examination.

This key question is from Phase Relation in a Pure Resistor topic in division Introduction to Alternating Currents and Voltages of Network Theory

Answer 1

The correct option is (a) lags reference angle by 15⁰

Explanation: As first sine wave has a positive peak at 75⁰, and another has a positive peak at 100⁰. Second sine wave lags reference angle by 15⁰ from the 0⁰ reference.