In the circuit diagram shown alongside, the two wires X and Y are of same length and same metal, but X is thicker than Y. Which ammeter will indicate a higher current strength?

In the circuit shown in the diagram given below: Calculate the total effective resistance of the circuit.

In the circuit shown in the diagram given below: Calculate the total current drawn from the battery.

In the circuit shown in the diagram given below: Calculate the value of current through each resistor.

Derive an expression for the total equivalent resistance $R$ when resistors $r_1, r_2$ and $r_3$ are connected in parallel.