Light globes - series & parallel |
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| This object shows Ohm's law, the relationship between changing voltage & current. The differences in current and brightness between globes when placed in a series or parallel can be seen, as well as the effect of switches in the circuit. |
Discussion questions |
- Why doesn't current flow when a switch is open?
- What happens to the current through a globe when the voltage is increased?
- What happens to the brightness of the globe when more current flows through it?
- What happens to the brightness and current when two globes are connected in series and switched on?
- What happens to the other globe if one of the globes in series breaks?
- What happens to the brightness and current when two globes are connected in parallel and switched on?
- What happens to the other globe if one of the globes in parallel breaks?
- How do you think that lights in a house are connected? Give two reasons why you think that is the case?
- What is the resistance of one of these globes?
- What is the resistance of two globes in series and two globes in parallel?
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