number and voltage of the cells in the circuit
resistance of each bulb
u see the light bulbs on a series circuit's brightness evolves and the brightness on a parallel's circuit dont
If the current is stronger then the bulb will be brighter.
-- 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 reading is much easier when you sit under the brighter bulb.
Tungsten. Thicker = less resistance = dimmer.
Energy output, as absolute brightness (magnitude) is taken at a standard distance of 10 parsecs.
You alter the brightness of a bulb by changing the voltage or frequency that is applied to the bulb.
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.
u see the light bulbs on a series circuit's brightness evolves and the brightness on a parallel's circuit dont
no
relative "brightness" is based on distance, size, and temperature
Considering that everything else is equal, ie. glass, incoming wire. If you are talking only about the filament wire that is attached between the Two poles inside the bulb, the answer is friction. The thicker the wire the less resistance it will have and will allow more electricity to pass without creating friction, the friction is what causes the wire to heat up and glow.
brightness
If the current is stronger then the bulb will be brighter.
If the bulb is of the incandescent variety, then reducing the current in the circuit will do this.
Brightness corresponds to amplitude of waves. Greater amplitude means greater brightness (so lower amplitude means less brightness).