Answer: Infinity.
- A Zero
- B Infinity
- C 1 ohm
- D Very low
Correct answer: B. Infinity
Explanation: An ideal voltmeter has infinite resistance so it draws no current and doesn't affect the circuit.
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.