D.धार पर निर्भर करता है
CV=G
Which of the following relation between the resistance of
galvanometer and V, the resistance of voltmeter is correct
BGV
A V >G
Answers
Explanation:
The ammeter has less resistance than voltmeter.
As in the ammeter the resistance is added in the series so it requires less resistance to flow the current and measure it where as in the voltmeter the resistance is added in parallel so it requires high resistance.
Say that you are trying to measure the voltage drop across a resistor RR through which passes a current ii. If the internal resistance of the voltmeter is comparable to RR, then the current ii will be divided through both branches, and the voltage value you read will be different from when the resistor is connected alone. If you make the internal resistance very large, then the current flowing through the voltmeter will be negligible, and the voltage drop across the resistor will not change.
The same applies to ammeter; since you're connecting them in series with the rest of the circuit, you need the device's internal resistance to be negligible so that it doesn't affect the current flowing through the branch. If you connect a voltage source VV to a resistor RR and want to measure the current flowing through the resistor, if the ammeter's internal resistance is not negligible, the total resistance the voltage source "sees" will be different, so by Ohm's Law the current will also be different.