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Q: What effect does the pencil lead have on the brightness of the bulb in a circuit?
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What effect would a pencil have on the brightness of a bulb?

A pencil has nothing to do with the brightness of a light bulb.


How does the brightness of each bulb in a parallel circuit compare to the brightness of the bulb in a series circuit?

u see the light bulbs on a series circuit's brightness evolves and the brightness on a parallel's circuit dont


Why did the light bulb change brightness along the pencil?

because the pencil take the a litte enrgy.


How do we decrease the brightness of a bulb?

If the bulb is of the incandescent variety, then reducing the current in the circuit will do this.


The current is 0.4 A and the bulb in the circuit is bright. What will happen to the brightness of the bulb if you put another bulb in series in the circuit?

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.


If a paper and pencil lead is connected to a light bulb circuit which one will turn on the light bulb?

The Pencil lead


If the electrical conductivity in an electrical circuit decreases then the brightness of the light bulb does what?

Then the brightness of the light buld increases.


What happens to the brightness of the bulb when the second bulb is put into a series circuit?

it should become dimmer


How does area of the circuit affect brightness of bulb?

if light is low it can cuase the bulb brightnees.


What is the factor that affects the brightness of the bulb?

number and voltage of the cells in the circuit resistance of each bulb


How does the brightness of each bulb in a parallel circuit compare to the brightness of the bulb in a simple circuit?

The brightness of each bulb in a parallel circuit is the same as the brightness of a bulb in a simple circuit. By Kirchoff's voltage law, each element of a parallel circuit has the same voltage drop across it. With the same voltage, the same type of bulb will dissipate the same power, and have the same brightness.


In which circuit did screwing out one bulb not influence the lighting of the other bulb?

A parallel circuit will not effect the other bulb. If the bulbs are in a series circuit the other bulb will not turn on.