Answer: 0.60 A.
- A 0.25 A
- B 0.50 A
- C 0.75 A
- D 0.60 A
Correct answer: D. 0.60 A
Explanation: For cells in parallel, Eeq = (E1/r1 + E2/r2)/(1/r1 + 1/r2) = 1.5 V. The equivalent internal resistance is 0.5 Ω. Hence I = 1.5/(2 + 0.5) = 0.60 A.
In series, the same current flows through both resistors; in parallel, the current splits between branches and the voltage across each resistor is the same.
Concept context
Ohm's law, resistors, Kirchhoff's laws, Wheatstone bridge, and cells.