TS EAMCET · Physics · Alternating Current
An inductor and a resistor are connected in series to an ac supply. If the potential differences across the inductor and the resistor are 180 V and 240 V respectively, then the voltage of the ac supply is
- A 300 V
- B 420 V
- C 60 V
- D 210 V
Answer & Solution
Correct Answer
(A) 300 V
Step-by-step Solution
Detailed explanation
\(V_{supply} = \sqrt{V_R^2 + V_L^2}\) \(V_{supply} = \sqrt{(240 \, \text{V})^2 + (180 \, \text{V})^2}\) \(V_{supply} = \sqrt{57600 \, \text{V}^2 + 32400 \, \text{V}^2}\) \(V_{supply} = \sqrt{90000 \, \text{V}^2}\) \(V_{supply} = 300 \, \text{V}\)
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