Which of the following statement is correct?

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When resistors are connected in parallel, they have the same current running through them.

When resistors are connected in series, they all have the same potential difference.

When resistors are connected in series, the same current flows through them.

When resistors are connected in parallel, they could have different potential differences.

answer is B.

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Detailed Solution

A series circuit has only one path through which its current can flow. It goes through every component in the circuit. Therefore, all of the components in a series connection carry the same current.
However, the potential difference is different in series combinations because the total potential difference of the supply is shared between them and is directly proportional to the individual resistances.

In a parallel combination of resistors, the ends of each resistor are connected to the ends of the same source of potential. Therefore, the potential difference(voltage) across each resistance is the same.
However, the current is split between the resistors and is inversely proportional to the value of individual resistances.

Therefore, "when resistors are connected in series, the same current flows through them" is the only correct statement.

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