The Voltage Drop Across a Metal Bar Is $5.0 \mathrm {~V}$

Multiple Choice

The voltage drop across a metal bar is $5.0 \mathrm {~V}$ while a current of $10.0 \mathrm {~mA}$ flows through it. How much power does this bar dissipate?

A) $0.50 \mathrm {~kW}$
B) $500 \mu \mathrm { W }$
C) $2.5 \mathrm {~kW}$
D) $50 \mathrm {~mW}$