Question: Please show necessary mathematical calculations step by step and answer this. 1. (i) Wires A and B are both made of copper. The wires are

Please show necessary mathematical calculations step by step and answer this.

(i) Wires A and B are both made of copper. The wires are connected in series, so we know they carry the same current. However, the diameter of wire A is twice the diameter of wire B. Which wire has the higher number density (number per unit volume) of charge carriers?

(ii) If the current in a resistor is I, the power delivered to the resistor is P. If the current in the resistor is increased to 3I, what is the power then delivered to the resistor? (Assume the resistance of the resistor does not change.)

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