TG EAMCET 2 May 2025 Shift 2 Paper

In an L-R series circuit,
Voltage across resistor: VR=240V
Voltage across inductor: VL=180V
We are asked to find the supply voltage V.
Step 1: Relation between voltages in series L-R circuit
In a series L-R circuit, the resistor voltage VR and the inductor voltage VL are 90∘ out of phase (since VR is in phase with current, and VL leads the current by 90∘ ).
Hence, the total voltage is obtained by the vector sum:
V=√VR2+VL2
Step 2: Substitute given values
‌V=√(240)2+(180)2
‌V=√57600+32400=√90000=300V
Final Answer:
300V
Option A