In the circuit diagram shown, the two resistance wires $A$ and $B$ are of same area of cross-section and same material, but $A$ is longer than $B .$ Which ammeter $A_{1}$ or $A_{2}$ will indicate higher reading for current ? Give reason.
In the circuit diagram shown, the two resistance wires $A$ and $B$ are of same area of cross-section and same material, but $A$ is longer than $B .$ Which ammeter $A_{1}$ or $A_{2}$ will indicate higher reading for current ? Give reason.
Ammeter $A _{2}$ shows higher reading. Because, since wire $A$ is longer; it has greater resistance and so draws lesser current. So more current flows through $B$ and $A _{2}$ shows more reading.
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