Two light globes are connected
in parallel to a 9 V battery.
What is the voltage across each lamp
Solution
Although the light globes look identical their resistance is different. Place globes "A", "B" and "C" in order from highest to lowest resistance.
What is the total current supplied by the battery?
Three different light globes were connected as shown on the right. The current through each globe was measured.
Place globes "A", "B" and "C" in order from highest to lowest resistance.
What can you say about the current put out by the battery?
What was the voltage across each of the other globes?
Were the light globes glowing at maximum brightness?
If the globes are not glowing at maximum brightness, what should the minimum voltage of the battery be to achieve maximum brightness?
What
would happen to the current flowing through globes "A" and "B"
if globe "C" was to blow?
Would the brightness of globes "A" and "B" increase?
How would the total current coming out of the battery change?