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Question

What is an advantage of a bridge rectifier over a center-tapped full-wave rectifier?

This question was previously asked in
RRB JE 2025 CBT 2 Mechanical and Allied Engg Question Paper English (2-Jul-2026) (Shift-1)
The correct answer is

A bridge rectifier can operate using diodes with lower peak inverse voltage rating

To determine the advantage of a bridge rectifier over a center-tapped full-wave rectifier, let's explore the operational differences and characteristics of both rectifiers with respect to their diode requirements and voltage ratings:

  1. Bridge Rectifier Basics:
    • A bridge rectifier consists of four diodes arranged in a bridge configuration.
    • It utilizes the entire secondary winding of the transformer, providing full-wave rectification without the need for a center tap.
    • Each diode in a bridge rectifier only needs to withstand the peak voltage of half the secondary winding, leading to a lower peak inverse voltage (PIV) requirement for each diode.
  2. Center-Tapped Full-Wave Rectifier Basics:
    • A center-tapped full-wave rectifier requires two diodes and a transformer with a center tap.
    • Each diode in a full-wave rectifier must withstand the entire peak voltage of the secondary winding, resulting in a higher peak inverse voltage (PIV) requirement for each diode.
    • Requires a specific transformer with a center tap, which can be more costly and less flexible than a standard transformer.
  3. Comparison and Conclusion:
    • Option D: "A bridge rectifier can operate using diodes with lower peak inverse voltage rating" is the correct answer.
    • This is because the PIV of each diode in a bridge rectifier is affected only by half of the secondary voltage, unlike in the center-tapped rectifier.
    • Ruling out other options:
      • Option A: A bridge rectifier requires more diodes than a center-tapped full-wave rectifier (4 diodes vs. 2 diodes).
      • Option B: The statement about using only half of the transformer secondary winding is incorrect because the bridge uses the entire winding.
      • Option C: Bridge rectifiers do not produce a higher ripple factor compared to full-wave center-tapped configurations.

In conclusion, the correct advantage of a bridge rectifier is its ability to use diodes with lower peak inverse voltage ratings compared to a center-tapped full-wave rectifier, making it more efficient and economical in terms of component requirements.

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Important Questions from Types of Diode

  1. A PIN diode can not be used as

    i. Microwave switch
    ii. Microwave mixer
    iii. Microwave detector

    Which is correct ?

  2. ________ diode is not used as a microwave mixer or detector.

  3. Match the given lists :

    List – I (Name of the Device)List – II (Application) 
    a. Diode i. Rectification
    b. Tunnel diodeii. Microwave switching
    c. Zener diodeiii. An oscillator
    d. PIN diodeiv. Voltage regulation

    Codes :

  4. Varacter diodes have the following properties :

    A. Junction capacitance varies with bias voltage

    B. Junction capacitance varies with time

    C. Non linearity of varacter diodes makes them suitable for frequency multipliers

    D. Linearity of varactor diode makes them suitable for frequency multipliers.

    Choose the correct answer from the options given below:

  5. In a tunnel diode, the degeneracy on the n-side can be expressed as

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