answersLogoWhite

0

If a rheostat is connected in parallel with a light bulb, the setting of the rheostat

should have no effect on the performance of the light bulb, as long as the power

supply is able to maintain its output voltage and deliver the current demanded by

their parallel combination.

User Avatar

Wiki User

14y ago

What else can I help you with?

Continue Learning about Engineering

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.


If you add an extra bulb to your series circuit what will happen to the brightness of your bulbs?

They will dim because you have more resistance in the circuit. More resistance means less current which means less light. The power is P=V*I = I/R*I = I²/R Think of blowing through one straw. Now attach a second straw end on with no leaks between joints and then attach a third straw in a long line. Which one is the easiest to blow?


What is the relationship between lamp brightness and resistance in a series circuit?

The higher the resistance the dimmer the light will become. The voltage drop (current) is proportional to the resistance as seen in the equation V=IR, since voltage remains the same throughout a series circuit if the equivalent resistance goes up the amount of current reaching the lightbulb must go down to equal the voltage thus creating a dimmer lightbulb.


Why will the current flow be different in a heated rear screen circuit than a side light circuit?

the heated rear screen circuit has a higher resistance compared to the side light circuit


What will happen if a second bulb is added to a parallel circuit?

-- The voltage doesn't change. -- If the second light bulb is identical to the first, then the total resistance drops by half. -- If they're not identical, then we have to know the details of both before we can calculate their combined effective resistance.

Related Questions

How can a variable resistor be used to control the brightness of light?

A variable resistor can be connected in series with a light bulb in a circuit. By adjusting the resistance of the variable resistor, the current flowing through the circuit changes, affecting the brightness of the light bulb. Increasing the resistance decreases the current, resulting in lower brightness, while decreasing the resistance increases the current, leading to higher brightness.


Light bulbs in a series circuit have the same brightness?

If they have the same resistance they will. Kirchhoff's' Law.


Which circuit was the light bulb the dimmest?

The light bulb was likely the dimmest in the circuit where it had the highest resistance, creating more opposition to the flow of current, resulting in less brightness.


How does resistance affect the brightness of the bulb?

Increasing resistance in a circuit will decrease the current flowing through the bulb, resulting in reduced brightness. This is because the resistance restricts the flow of electrons and diminishes the amount of energy reaching the bulb to produce light.


How does a toggle dimmer switch work to adjust the brightness of a light fixture?

A toggle dimmer switch adjusts the brightness of a light fixture by controlling the amount of electricity flowing to the light. When the switch is toggled, it changes the resistance in the circuit, which in turn alters the amount of power reaching the light bulb, allowing for the brightness to be adjusted.


How does a slide dimmer control the brightness of a light fixture?

A slide dimmer controls the brightness of a light fixture by adjusting the amount of electrical current flowing to the light. Sliding the dimmer switch changes the resistance in the circuit, which in turn regulates the amount of power reaching the light bulb, resulting in varying levels of brightness.


Why does the length of the wires does not matter when lighting a light bulb?

The length of the wire does not typically affect the brightness of the light bulb because the resistance in the wire remains fairly constant regardless of its length. The resistance of the wire is what actually determines the amount of current flowing through the circuit, which in turn affects the brightness of the light bulb.


What happens to the current in the other lights if one light burns out in a series circuit?

It depends what is the outcome of burning. If that light has created open circuit, circuit will break and there will not be any current. But if there is short circuit means overall resistance is decreased. Thus current will increase. Besides overall brightness will also increase. Thus, if in a series lesser the number of bulbs more will be brightness.


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.


Which circuit can decrease the fluorescent brightness to the minimum amount?

You need to purchase a Fluorescent dimmer switch, no circuit can dim the brightness of the light safely.


Light bulb in parallel circuit brightness?

In a parallel circuit, each light bulb receives the full voltage of the power source, so the brightness of each light bulb remains constant even if more bulbs are added to the circuit. This is because each bulb has its own separate path for current to flow, without affecting the others.


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

In a parallel circuit, each bulb receives the full voltage of the power source, so all bulbs shine at their full brightness. In a series circuit, the brightness of each bulb decreases as more bulbs are added because the voltage is shared among all bulbs.