CUET Preparation Today
For an ammeter, voltmeter and galvanometer having resistances $R_{A}, R_{V}$ and $R_{G}$ respectively, the correct relation among these resistances. |
$R_{A}<R_{G}>R_{V}$ $R_{A}<R_{G}<R_{V}$ $R_{A}>R_{G}>R_{V}$ $R_{A}>R_{G}<R_{V}$ |
$R_{A}<R_{G}<R_{V}$ |
The correct answer is Option (2) → $R_{A}<R_{G}<R_{V}$ Ammeter has law resistance $(R_A)$ to minimize its effect on current. Voltmeter has high resistance $(R_V)$ to minimize the current it drawn when measuring voltage. Galvanometer has an intermediate resistance $(R_G)$ because it needs to detect small currents. $∴R_{A}<R_{G}<R_{V}$ |
