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18 Nov 2021
Given information
- We have a circuit diagram with an ammeter(A) and a voltmeter(V) connected across the resistor R.
- Resistance of the voltmeter is .
Step-by-step explanation
Step 1.
Points to remember.
- A voltmeter is a device that measures voltage or potential difference hence its internal resistance is very high and ideally infinite. It is connected parallel to the device.
- An ammeter is a device that measures current hence its internal resistance is very low or ideally 0 ohms. Shunt resistors are used in ammeters to measure the voltage drop across hence current through the circuit. It is connected in series with the device.
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