A pencil has nothing to do with the brightness of a light bulb.
The brightness of a light bulb directly has no direct relationship with magnets and wire. The bulbs brightness is determined by the wattage of the bulb. The higher the wattage of the bulb the brighter the bulbs light output.
NO
ANSWER: The brightness of both bulbs will decrease. If the bulbs are identical the current will decrease to 0.2 Amps. This is a simple series resistive circuit, the more bulbs you add in series both the amperage and bulb brightness will continue to go down.
No.
lumen
because the pencil take the a litte enrgy.
-- If the bulbs are in parallel, then the addition of a bulb has no effect on the brightness of those that were there before. -- If the bulbs are in series, then the addition of a bulb causes the brightness of those that were there before to decrease. (And I wasn't even there when you did the experiment !)
The brightness of a bulb would not change if you added a second bulb in parallel with the first.Unless, of course, the increased current exceeded the power supply's capacity causing a reduction in voltage.
You alter the brightness of a bulb by changing the voltage or frequency that is applied to the bulb.
If smaller means less power for the same voltage, then a smaller bulb would result in less brightness. If smaller means less voltage for the same power, then a smaller builb would result in more brightness.
The brightness of three bulb would be mare than one
The brightness of a light bulb directly has no direct relationship with magnets and wire. The bulbs brightness is determined by the wattage of the bulb. The higher the wattage of the bulb the brighter the bulbs light output.
u see the light bulbs on a series circuit's brightness evolves and the brightness on a parallel's circuit dont
pencil is older.
brightness
If the bulb is of the incandescent variety, then reducing the current in the circuit will do this.
If the current is stronger then the bulb will be brighter.