Answer: H 1 :H 2 = 1:2.
- A H<sub>1</sub>:H<sub>2</sub> = 1:2
- B H<sub>1</sub>:H<sub>2</sub> = 2:1
- C H<sub>1</sub>:H<sub>2</sub> = 1:4
- D H<sub>1</sub>:H<sub>2</sub> = 4:1
Correct answer: A. H<sub>1</sub>:H<sub>2</sub> = 1:2
Explanation: In series, same current. H = I<sup>2</sup> R t. H<sub>1</sub>/H<sub>2</sub> = R<sub>1</sub>/R<sub>2</sub> = 1/2.
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.