Question

1. a student sets up an experiment using the circuit shown below.

she uses the following bulbs in the circuit, one at a time, and records the readings on the ammeter.
the results obtained are shown in the table below.

circuit	bulb	ammeter reading / a
2	b	0.1
3	c	4.0

(a) describe what happens to the bulbs when placed in the circuit.
1

Explanation:

To determine what happens to the bulbs, we analyze the ammeter readings (current, \( I \)). Higher current means more charge flow, so the bulb with higher \( I \) (Bulb C, \( 4.0 \, \text{A} \)) will be the brightest, followed by Bulb A (\( 2.0 \, \text{A} \)), and Bulb B (\( 0.1 \, \text{A} \)) will be the dimmest (or may barely light up). All bulbs should light up since they are in a closed circuit, but brightness varies with current (assuming constant voltage from the battery, \( P = VI \), so power and brightness increase with \( I \)).

Answer:

All bulbs light up, but their brightness differs: Bulb C (4.0 A) is the brightest, Bulb A (2.0 A) is moderately bright, and Bulb B (0.1 A) is the dimmest (or barely lights up).