In a series circuit, an ammeter placed before the first resistor shows a reading of 0.3 A. Without any calcul…

Question

In a series circuit, an ammeter placed before the first resistor shows a reading of 0.3 A. Without any calculation, what will the ammeter read if it is moved to a position between the second and third resistors? Justify your answer.

Accepted Answer

## Model Answer The ammeter will read **0.3 A**. In a series circuit, the current remains the same throughout; it does not change with the position of the ammeter in the circuit. *Source: Chapter 11, Section 11.6.1 – Resistors in Series* ## Explanation The key principle tested here is: **current is constant at every point in a series circuit**. The examiner wants the correct value (0.3 A) AND the justification (series circuit → same current everywhere). Both parts are needed for full credit even in a 1-mark question. Avoid saying "no calculation needed" as your justification — state the physics law instead.

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