COMEDK · Physics · 23. Alternating Current
An alternating voltage \(=200 \sin 100 t\) is applied to a series combination of \(R=30 \Omega\) and an inductor of \(400 \mathrm{mH}\). The power factor of the circuit is,
- A 0.01
- B 0.6
- C 0.05
- D 0.042
Answer & Solution
Correct Answer
(B) 0.6
Step-by-step Solution
Detailed explanation
The given alternating voltage is \(V = 200 \sin(100t)\), which is of the form \(V = V_m \sin(\omega t)\). Comparing the two, the angular frequency is \(\omega = 100 \text{ rad/s}\). The resistance is \(R = 30 \Omega\) and the inductance is \(L = 400 \text{ mH} = 0.4 \text{ H}\).…
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