Page 132 - SK Year 5 Science DLP

THE BRIGHTNESS
THE BRIGHTNESS
LET’S TEST
LET’S TEST
OF BULBS
OF BULBS
To investigate the relationship between types of circuit
AIM
and the brightness of bulbs.
APPARATUS AND Four bulbs, four bulb holders, four dry cells, four

MATERIALS dry cell holders, two switches, and connecting
wires with crocodile clips.
STEPS

1. Build a series circuit using 2. Then, build a parallel circuit using
two bulbs. the same number of bulbs.

3. Close the switches in both circuits 4. Observe the brightness of the bulbs
simultaneously. in both circuits.

(a) What are your observations on the brightness of the bulbs
in this activity? Explain.
(b) What can you conclude from your observations?

Ozair arranges five bulbs for two different arrangement
of circuits. Which circuit lights brighter bulbs? Why?

Circuit A Circuit B
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5.2.3, 5.2.7