A 50-mv meter has a resistance of 5 ohms. A multiplier has been inserted to produce a voltmeter of range 3 volts. how can the multiplier be modified so that the new meter will have the range of 15 volts?

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Asked 9/21/2011 11:24:46 AM

Updated 4/28/2023 12:47:50 AM

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User: A 50-mv meter has a resistance of 5 ohms. A multiplier has been inserted to produce a voltmeter of range 3 volts. how can the multiplier be modified so that the new meter will have the range of 15 volts?

Weegy: Current sensitivity is R = E/I = 50mV/5 = 10 mA for 3 volts, you need to add a resistor of R = 3/10ma – 5 = 300–5 = 295 ohms for 15 volts you need R = 15/10ma – 5 = 1500–5 = 1495 ohms to modify from 3v to 15 v you need to add 1495–295 = 1200 ohms.
Expert answered|tthau2010|Points 415|

User: An ammeter has a resistance of 0.0090 ohm reads up to 10 amps. What resistance shunt is needed to make full-scale deflection of the meter correspond to 100 mps?

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Asked 9/21/2011 11:24:46 AM

Updated 4/28/2023 12:47:50 AM

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An ammeter has a resistance of 0.0090 ohm reads up to 10 amps. 0.01 ohm is needed to make full-scale deflection of the meter correspond to 100 mps.

Added 4/28/2023 12:47:50 AM

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