Electro Magnetic Induction And Alternating Currents Question 43
Question: A 12 ohm resistor and a 0.21 henry inductor are connected in series to an ac source operating at 20 volts, 50 cycle/second. The phase angle between the current and the source voltage is [BHU 1994]
Options:
A) 30°
B) 40°
C) 80°
D) 90°
Show Answer
Answer:
Correct Answer: C
Solution:
$ \tan \varphi =\frac{\omega L}{R}=\frac{2\pi \times 50\times 0.21}{12}=5.5,\Rightarrow ,\varphi =80^{o} $
