Two identical copper wires P and Q are maintained at different temperatures

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits

Problem

Two identical copper wires P and Q are maintained at different temperatures. When a potential difference of

2.00\,\text{V}

is applied across each wire, the currents measured are

1.00\,\text{A}

for P and

0.80\,\text{A}

for Q. Which of the following statements is correct regarding their temperatures? (a)

T_P > T_Q

because the resistance of P is less than that of Q (b)

T_P > T_Q

because the current through P is greater than through Q (c)

T_P < T_Q

because the resistance of P is less than that of Q (d)

T_P = T_Q

because the wires are identical and the same potential difference is applied