Why should the resistance of the ammeter be small and the resistance of the voltmeter large?
| November 9, 2020 | Education
The resistance of the ammeter should be low, because it is included in the circuit in series: 1 = U / (R + Ra) The lower the resistance Ra, the less it affects the measured value l.
The resistance of the voltmeter must be large, because it is connected in parallel in the circuit: U = IR = IvRv. The greater the resistance Rv, the lower the current I will be. the less it affects the measured value U.
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