NEET Physics: Electronic Devices — MCQ Test 4

Q6. The purpose of a centre-tap transformer in a full-wave rectifier is to:

Q7. The process of adding impurities to a pure semiconductor is called:

Q8. In forward bias, the resistance of a p-n junction diode is:

Q9. In an n-type semiconductor, the minority carriers are:

Q10. The ionization energy of donor electrons in an n-type semiconductor is:

NEET Physics — Electronic Devices

Free MCQ Test 4 of 9

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Medium

The output frequency of a full-wave rectifier with a 60 Hz input is:

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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 Electronic Devices. 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 Frequency, Rectifier, Junction, Intrinsic, Semiconductor, and Conduction.

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. The output frequency of a full-wave rectifier with a 60 Hz input is:

  • A. 60 Hz
  • B. 120 Hz
  • C. 30 Hz
  • D. 180 Hz

Q2. The drift current in a p-n junction is caused by:

  • A. Electric field
  • B. Concentration gradient
  • C. Thermal energy
  • D. External voltage

Q3. In an intrinsic semiconductor at \( T > 0 \, \text{K} \), the conduction is due to:

  • A. Electrons only
  • B. Electrons and holes
  • C. Holes only
  • D. Ionic movement

Q4. A Ge crystal with \( 4 \times 10^{28} \, \text{atoms} \, \text{m}^{-3} \) is doped with 1.5 ppm of trivalent impurity. The number of holes per cubic meter is approximately:

  • A. \( 2 \times 10^{22} \, \text{m}^{-3} \)
  • B. \( 4 \times 10^{22} \, \text{m}^{-3} \)
  • C. \( 8 \times 10^{22} \, \text{m}^{-3} \)
  • D. \( 6 \times 10^{22} \, \text{m}^{-3} \)

Q5. The recombination process in a semiconductor:

  • A. Generates new electron-hole pairs
  • B. Increases minority carriers
  • C. Reduces free carriers
  • D. Enhances conductivity

+ 5 more questions in the actual test

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