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1. SUBJECT : ELECTRICAL AND
ELECTRONIC
MEASUREMENTS
SUBJECT CODE : EE203G
TOPIC NAME : AC VOLTMETER
RECTIFIER
TYPE ( HALF WAVE AND FULL
WAVE)
GUIDED BY : A. P. GANDHI
PRESENTED BY : Aarti Ravindra
Bopche

2.  CONTENTS :
1. Introduction
2. Need Of AC Voltmeter Rectifier
3. Types Of AC Voltmeter Rectifier
4. Advantages & Disadvantages
5. Applications
6. Conclusion

3. 1. INTRODUCTION
• The instrument, which is used to measure the AC voltage
across any two points of electric circuit is called AC voltmeter.
• If the AC voltmeter consist of rectifier, then it is said to be
rectifier based AC voltmeter.
• The DC voltmeter measures only DC voltages, If we want
to use it for measuring AC voltages, then we have follow two
steps.
STEP 1: Convert the AC voltage signal into a DC voltage signal
by using a rectifier.
STEP 2: Measure the DC or average value of the rectifiers
output signal.
• WE get, Rectifier based AC voltmeter, just by including the
rectifier circuit to the basic DC voltmeter.

4. 2. NEED OF AC VOLTMETER
RECTIFIER
• AC voltmeter rectifiers are
used to convert Alternating
current (AC) to Direct current
(DC) for voltage
measurements.
• Two common types are Half
wave and Full wave rectifiers.
Half wave rectifiers use only
half of the AC waveform, while
full wave rectifiers use both
halves.
• Each type has its own set of
advantages and disadvantages.

5. 3. TYPES OF AC VOLTMETER
RECTIFIER
Half wave Rectifiers
• In a half wave rectifiers, only the
positive half of the AC waveform is
used.
• This results in a lower output
voltage and higher ripple
compared to full wave rectifiers.
However, the half wave rectifiers
are simpler and cheaper to
implement.
• They find applications in low-cost
devices where accuracy is not
critical.

6. Full wave rectifier
• Full wave rectifiers utilize both
the positive and negative halves of
the AC waveform .
• This leads to a higher output
voltage and lower ripple, making
them more accurate than half wave
rectifiers.
However, full wave rectifiers are
more complex and expensive.
• They are commonly used in
precision instruments and high-end
electrical systems.

7. 4. ADVANTAGES & DISADVANTAGES
• The advantages of half wave rectifiers include simplicity
and low cost, but they suffer from lower accuracy and higher
ripple.
• On the other hand, full wave rectifiers offer higher accuracy
and lower ripple, but are more complex and expensive to
implement.
• The choice between the two depends on the specific
requirements of the application.

8. 5. APPLICATIONS
• Half wave rectifiers are
commonly used in low-cost
consumer electronics, such as
battery-powered devices and
simple voltage measurements.
• Full wave rectifiers find
applications in precision
instruments, such as laboratory
equipment, power supplies,
and industrial control systems
that demand accurate voltage
measurements.

9. 6. CONCLUSION
In conclusion, AC voltmeter rectifiers play a critical role in
converting AC to DC for accurate voltage measurements .
both half wave and full wave rectifiers have their own
advantages and disadvantages, making them suitable for
different applications. Understanding their characteristics
is essential for selecting the right rectifier for a given
electrical systems .