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Multi Range Ammeter Questions

The document contains questions about designing multi-range ammeters and voltmeters using D'Arsonval movements. It asks about determining shunt and multiplier resistor values to create instruments with various current and voltage measurement ranges. The questions cover topics like selecting resistor values for specific movement specifications and designing instruments to measure currents from milliamps to amps or voltages from volts to hundreds of volts.

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Ravi Shankar 31
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351 views1 page

Multi Range Ammeter Questions

The document contains questions about designing multi-range ammeters and voltmeters using D'Arsonval movements. It asks about determining shunt and multiplier resistor values to create instruments with various current and voltage measurement ranges. The questions cover topics like selecting resistor values for specific movement specifications and designing instruments to measure currents from milliamps to amps or voltages from volts to hundreds of volts.

Uploaded by

Ravi Shankar 31
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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MULTI RANGE AMMETER QUESTIONS

Q1 Design a multi-range ammeter with ranges of 0-100 mA, 0-200 mA, 0-500 mA, 0-1 A employing individual
shunts for each range. A D' Arsonval movement with an internal resistance of 500Ω and a full scale current of
100 µA is available?

Q2 Design a multi-range ammeter with ranges of 0-1 A, 5 A, 25 A, 125 A employing individual shunts for each
range. AD' Arsonval movement with an internal resistance of 730 Ω and a full scale current of 5 mA is
available?

Q3 Design an Ayrton shunt to provide an ammeter with current ranges of 0-1mA, 5 mA, 20 mA and 50 mA, using a
D' Arsonval movement having internal resistance of 50 Ω and a full scale current of 100 µA?

Q4 Design an Ayrton shunt to provide an ammeter with current ranges of 0-100 mA, 500 mA, l A, using a D'
Arsonval movement having internal resistance of 50 Ω and a full scale current of 1 mA.

Q5 Design an Ayrton shunt to provide an ammeter with current ranges of 0-5 mA, 10 mA, l5 mA, using a D'
Arsonval movement having internal resistance of 168.3 Ω and a full scale current of 0.31 mA.

MULTI RANGE VOLTMETER QUESTIONS

Q1 A D' Arsonval movement with a full scale deflection current of 50 µA and internal resistance of 500 Ω is to
be converted into a multi-range voltmeter. Determine the value of multiplier required for 0-20 V, 0-50 V and
0-100 V?

Q2 Convert a basic D 'Arsonval movement with an internal resistance of 100 Ω and a full scale deflection of 10
mA into a multi-range dc voltmeter with ranges from 0 - 5 V, 0 - 50 V and 0 - 100 V?

Q3 Convert a basic D'Arsonval movement with an internal resistance of 100 Ω and a full scale deflection of 1
mA into a multi-range dc voltmeter with voltage ranges of 0-1 V, 0-10 V, and 0-50V.

Q4 A basic D' Arsonval movement with a full scale deflection of 50 µA and an internal resistance of 1800 Ω is
available. It is to be converted into a 0-1 V, 0-5 V, 0-25 V and 0-225 V multi-range voltmeter using
individual multipliers for each range. Calculate the values of the individual resistors?

Q5 Convert a basic D'Arsonval movement with an internal resistance of 168.33 Ω and a full scale deflection of
0.31mA into a multi-range dc voltmeter with voltage ranges of 0-10 V, 0-20 V, and 0-30V.

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