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NEET 2026
Exam
NEET
Year
2026
Subject
Physics
Chapter
Chapter

NEET 2026 · Physics · Chapter

An ideal inductor of inductance L = (2)/(π) H is connected to an AC...

An ideal inductor of inductance L = (2)/(π) H is connected to an AC source as shown in the figure. If the RMS voltage
An ideal inductor of inductance L=2π HL = \dfrac{2}{\pi} \text{ H} is connected to an AC source as shown in the figure. If the RMS voltage of the source is 220 V220 \text{ V} and its frequency is 50 Hz50 \text{ Hz}, the peak current in the circuit is approximately: (Take 2=1.41\sqrt{2} = 1.41)

Options

  1. A1.10 A1.10 \text{ A}
  2. B0.78 A0.78 \text{ A}
  3. C1.55 A1.55 \text{ A}
  4. D3.11 A3.11 \text{ A}

Correct answer

C. 1.55 A1.55 \text{ A}

Step-by-step solution

The inductive reactance XLX_L of the circuit is calculated as:

XL=ωL=2πfLX_L = \omega L = 2\pi f L

Substituting the given values f=50 Hzf = 50 \text{ Hz} and L=2π HL = \dfrac{2}{\pi} \text{ H}:

XL=2π×50×2π=200 ΩX_L = 2\pi \times 50 \times \dfrac{2}{\pi} = 200 \text{ } \Omega

The RMS current IrmsI_{\text{rms}} in the circuit is:

Irms=VrmsXLI_{\text{rms}} = \dfrac{V_{\text{rms}}}{X_L}

Substituting Vrms=220 VV_{\text{rms}} = 220 \text{ V}:

Irms=220200=1.1 AI_{\text{rms}} = \dfrac{220}{200} = 1.1 \text{ A}

The peak current I0I_0 is related to the RMS current by the relation:

I0=2IrmsI_0 = \sqrt{2} I_{\text{rms}}

Using the given value 2=1.41\sqrt{2} = 1.41:

I0=1.41×1.1=1.551 AI_0 = 1.41 \times 1.1 = 1.551 \text{ A}

The peak current is approximately 1.55 A1.55 \text{ A}.

Answer: 1.55 A1.55 \text{ A}
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