Topic: Thermodynamics
During the charging of a storage battery, the current I is 20A and the voltage E in 12.8V. The ratio of heat transfer from the battery is 16W. At what rate is the internal energy increasing?
- A. 256 Js^-1
- B. 272 Js^-1
- C. 0
- D. 240 Js^-1
Answer: D. 240 Js^-1
Explanation: Energy stored in battery during charging = (V * I) - Q = (12.8 * 20) - 16 = 256 - 16 = 240 W (or Js^-1).