NEET Physics: Alternating Currents — MCQ Test 24

Q6. A \( 10 \, \mu\text{F} \) capacitor is connected to a \( 230 \, \text{V} \), \( 50 \, \text{Hz} \) source. What is the rms current?

Q7. A \( 120 \, \Omega \) resistor is connected to a \( 240 \, \text{V} \) (rms) AC source. What is the rms current?

Q8. A \( 40 \, \text{mH} \) inductor is connected to a \( 230 \, \text{V} \), \( 50 \, \text{Hz} \) AC source. What is the rms current?

Q9. A \( 35 \, \mu\text{F} \) capacitor is connected to a \( 230 \, \text{V} \), \( 50 \, \text{Hz} \) AC source. What is the peak current?

Q10. A series LCR circuit has \( R = 70 \, \Omega \), \( X_L = 40 \, \Omega \), \( X_C = 20 \, \Omega \). What is the impedance?

NEET Physics — Alternating Currents

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What is the effect on the impedance of a series LCR circuit when the frequency is increased beyond the resonant frequency?

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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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Key concepts covered in this specific test include Impedance, Frequency, Increased, Resonant, Transformer, and Increase.

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. What is the effect on the impedance of a series LCR circuit when the frequency is increased beyond the resonant frequency?

  • A. It decreases
  • B. It increases
  • C. It remains constant
  • D. It becomes zero

Q2. Why does a step-down transformer increase the current in the secondary coil compared to the primary coil?

  • A. Because resistance increases
  • B. Because voltage increases
  • C. Because frequency decreases
  • D. Because power is conserved

Q3. What is the primary purpose of using laminated cores in transformers?

  • A. To increase resistance
  • B. To enhance capacitance
  • C. To increase voltage
  • D. To reduce eddy current losses

Q4. A \( 45 \, \text{mH} \) inductor is connected to a \( 230 \, \text{V} \), \( 50 \, \text{Hz} \) source. What is the peak current?

  • A. 22 A
  • B. 22.5 A
  • C. 23.02 A
  • D. 23.5 A

Q5. A series LCR circuit has \( R = 25 \, \Omega \), \( X_L = 45 \, \Omega \), \( X_C = 20 \, \Omega \). What is the power factor?

  • A. 0.6
  • B. 0.65
  • C. 0.707
  • D. 0.75

+ 5 more questions in the actual test

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