# You asked: What do you notice about the brightness of the bulbs as you add more bulbs?

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## What do you notice about the intensity or brightness of the bulb as you add more bulbs?

As more and more light bulbs are added, the brightness of each bulb gradually decreases. This observation is an indicator that the current within the circuit is decreasing. So for series circuits, as more resistors are added the overall current within the circuit decreases.

## What would happen to the brightness of the bulbs if more lamps were added to the parallel circuit?

When the bulbs are in parallel, each bulb sees the full voltage V so P=V2R. Since a bulb glows brighter when it gets more power the ones in parallel will glow brighter. See, the parallel combination of resistors reduces the effective resistance of the circuit.

## What happens to the brightness as you keep on adding more bulbs?

What is the effect on the brightness of the bulbs by increasing the number of bulbs? Increasing the number of bulbs decreases the brightness of the bulbs.

## What happens to the intensity or the brightness of the lamps?

If light bulbs are connected in series to a voltage source, the brightness of the individual bulbs diminishes as more and more bulbs are added to the “chain”. The current decreases as the overall resistance increases. In addition, if one bulb is removed from the “chain” the other bulbs go out.

## What would happen to the bulb if another bulb was added to the circuit?

If more light bulbs or other resistors are placed in a series circuit, there is more resistance in the circuit, and so the current, and the brightness of the lamps would be reduced.

## What happens when you add more bulbs to a parallel circuit?

As more bulbs are added in parallel, the current strength will decrease OR. As more bulbs are added in parallel, the current strength will increase.

## What may happen if you add another bulb to both of your setups?

When you plug in that second bulb, both will get equally dim, because you have added more resistance to your circuit, which decreases the flow of current. Adding another light bulb in series decreases the current because our battery now has more work to do! … You just add all of the different resistance values together.

## Does more watts mean brighter light?

More Watts doesn’t always mean a brighter light bulb. … However, today’s light bulbs are so much more energy efficient, they use fewer Watts to produce the same amount of light (lumens). This is why nowadays you need to think lumens, not Watts, when buying light bulbs.

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## What happens when you remove a bulb from a parallel circuit?

One bulb burning out in a series circuit breaks the circuit. In parallel circuits, each light has its own circuit, so all but one light could be burned out, and the last one will still function.

## What happens to the brightness of bulb A when the switch is closed?

When the switch is closed, the light bulb operates since the current flows through the circuit. The bulb glows at its full brightness since it receives its full 120 volts and has the design current flow (Figure 1).

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