A voltmeter of range 5 V is to be converted into an ammeter of range 10 mA. If the resistance of voltmeter is 1 Kilo ohm , then what resistance should be connected in parallel with it ?
Asked by dipanshusingla029
31st March 2018,
7:06 PM
Answered by Expert
Answer:
Voltmeter of range 5V has a resistance 1 kΩ. Hence the current passing through this voltmeter is 5 mA.
If this voltmeter is to be used to be converted as an ammeter of current range 10 mA, we have to connect another reasitance 1 kΩ parallel to the existing 1 kΩ resistor.
Then 10 mA current is equally shared by resistance of voltmeter and the new resistance added parllely. Since resistance of voltmeter is getting only 5 mA, it works as per requirement
Answered by Expert
1st April 2018,
7:47 AM
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