NEET Physics: Alternating Currents — MCQ Test 6

Q6. A \( 30 \, \mu\text{F} \) capacitor is connected to a \( 220 \, \text{V} \), \( 50 \, \text{Hz} \) AC source. What is the peak current?

Q7. A series LCR circuit has \( R = 100 \, \Omega \), \( X_L = 80 \, \Omega \), \( X_C = 60 \, \Omega \). What is the impedance?

Q8. What is the effect on the power factor of an LCR series circuit when the frequency is decreased below resonance?

Q9. A series LCR circuit with \( R = 25 \, \Omega \) is at resonance with a \( 200 \, \text{V} \) (rms) source. What is the rms current?

Q10. A \( 80 \, \text{mH} \) inductor is connected to a \( 230 \, \text{V} \), \( 60 \, \text{Hz} \) AC source. What is the rms current?

NEET Physics — Alternating Currents

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Medium

A transformer has \( N_p = 100 \) and \( N_s = 200 \). If the primary voltage is \( 220 \, \text{V} \) (rms), what is the secondary voltage?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Alternating Currents. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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10
Medium
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Key concepts covered in this specific test include Transformer, Secondary, Dissipated, Capacitive, Complete, and Capacitor.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. A transformer has \( N_p = 100 \) and \( N_s = 200 \). If the primary voltage is \( 220 \, \text{V} \) (rms), what is the secondary voltage?

  • A. 400 V
  • B. 440 V
  • C. 480 V
  • D. 500 V

Q2. What is the average power dissipated in a purely capacitive circuit over one complete cycle?

  • A. 0 W
  • B. \( \frac{i_m v_m}{2} \) W
  • C. \( i_m v_m \) W
  • D. \( \frac{v_m^2}{X_C} \) W

Q3. A \( 18 \, \mu\text{F} \) capacitor is connected to a \( 110 \, \text{V} \), \( 60 \, \text{Hz} \) AC source. What is the rms current?

  • A. 0.747 A
  • B. 0.8 A
  • C. 0.9 A
  • D. 1 A

Q4. In an AC circuit with a series combination of resistor and capacitor, what happens to the phase difference if the frequency approaches infinity?

  • A. It increases to 90°
  • B. It remains constant
  • C. It increases to 180°
  • D. It approaches 0°

Q5. A \( 50 \, \text{mH} \) inductor is connected to a \( 110 \, \text{V} \), \( 60 \, \text{Hz} \) AC source. What is the inductive reactance?

  • A. 18.84 Ω
  • B. 20 Ω
  • C. 22 Ω
  • D. 25 Ω

+ 5 more questions in the actual test

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