In a series 𝑅-𝐿 circuit, 𝑅=20 Ω, while 𝐿 = 60 𝑚H. The input current lags the supply voltage by 60° . The value of applied frequency will be nearly:
A. 91.9 Hz
B. 87.7 Hz
C. 82.7 Hz
D. 78.9 Hz
Answer:A
In a series 𝑅-𝐿 circuit, 𝑅=20 Ω, while 𝐿 = 60 𝑚H. The input current lags the supply voltage by 60° . The value of applied frequency will be nearly:
A. 91.9 Hz B. 87.7 Hz C. 82.7 Hz D. 78.9 Hz