How does the voltage across components in a series circuit compare?

In a series circuit, the voltage across each component is not equal to each other; rather, the voltage drop across each component depends on its resistance and the overall current flowing through the circuit. Instead of each component having the same voltage, the total voltage supplied by the source is divided among the components in proportion to their resistance.

Thus, the correct understanding is that the voltage across components varies according to their resistance as described in the first choice, but it does not mean that they are treated as equal. Therefore, while the total voltage from the power source does get distributed among the components, it is not equal across all components unless they have the same resistance.

When we ascertain the concept behind the correct answer, it's clear that in any reasonable set of circumstances in a series circuit, each component will experience some voltage drop that collectively sums up to the total supplied voltage. Hence, the total voltage will equal the sum of the individual voltage drops, making "It is always different across each component" a misleading assertion for this particular scenario.

In the case where the circuit has only one component or when there is no load, the voltage across a component could hypothetically equal zero, but it does not apply broadly to the operation of a standard series circuit with