Red Seal Electrician Practice
DC circuitsQuestion 673 of 1506

A voltage divider has two series resistors. The supply voltage is doubled and the resistors are not changed. What happens to the ratio of one voltage drop to the other?

  1. No change
  2. It doubles as well
  3. It is cut in half
  4. It falls to zero
Show answer

Correct answer: No change

The ratio of the drops depends only on the resistor values, not on the supply voltage.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 6.1: Voltage Divider Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026