3 Why does the bulb not light up? 1. When you were doing the activities in questions 1 and 2, were there times when
the bulb still did not light up in a closed circuit? 2. What may be the causes of the above situation?
Is the light bulb burned out?
Is the battery dead?
Are the wires loose?
Closed circuits
Main components
Components that turn electrical energy into other forms of energy
Power source
Connection
positive pole
negative pole
light bulb
switch
buzzer
wire
dry battery
connects and disconnects a circuit
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