What is the voltage drop across RL?
A. 0.22 V
B. 0.33 V
C. 0.75 V
D. 1.50 V
The diagram shows a small water heater that uses an electric current to supply energy to heat water. A heating element, RL, is immersed in the water and acts as a 1.0-Ω load resistor. A dc source is mounted on the outside of the water heater and is wired in parallel with a 2.0-Ω resistor (RS) and the load resistor. When the water is being heated, the current source supplies a steady current (I) of 0.5 A to the circuit. The water heater has a heat capacity of C and holds 1.0 × 10−3 m3 of water. The water has a mass of 1.0 kg. The entire system is thermally isolated and designed to maintain an approximately constant temperature of 60° C.