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What voltage is required to sustain a current of 0.50 through a light bulb resistance of 190?
The voltage of a circuit with a resistance of 250 ohms and a current of 0.95 amps is 237.5 volts. Ohms's law: Voltage = Current times Resistance
What happens to the current flowing in the ring main as more bulbs are turned on at night?
As more light bulbs are added in a series circuit, the effective resistance of the circuit increases. That causes the current leaving the source to decrease.
Why do parallel circuits provide more power to the lights?
With several lights in series across the power source, the full voltage of the power source is divided among the group of lights, in proportion to the resistance of each one, and the power available to each light depends on all of the others. The more lights in the series circuit, the less voltage each one gets, and the less power each can dissipate as light. ============================================ Another contributor added: Furthermore, power = voltage times current, and Current is equal to voltage divided by resistance. Putting lights in series increases the circuits resistance, which lowers the current, thus decreases power. This is why the overall light output of two lights in series will be less than a single light.
A string of 15 Christmas tree lights is connected in series to a 90 volt power source What is the value of the resistance of each light if the current flowing through the circuit is 2 amps?
33 ohms
A light blub has a resistance of 96.8 ohms What current flows through the bulb when it is connected to a 120 V source of energy?
V = I x R so 120/96.8 = 1.24 Amps.
Is a light bulb a soure of light?
Yes, a light bulb is a source of light. When current is going through the filament the resistance generates enough heat that the filament glows, producing light.
What is needed to light a light bulb?
Electricity has to pass through the filament which, when it gets hot enough from resistance to the current, begins to glow and give off light.
In what way the connections are made to get a higher output current from light?
A light doesn't output current, it "draws" current based on voltage and its resistance. Voltage = Current x Resistance or Current = Voltage / Resistance. (Ohm's Law)
What effect does decreased resistance have on a circuit?
resistance is the opposition to the flow of an electric current, therefore the current will decrease as the resistance increases. Resistance also creates heat. This is how the light globes in a circuit light up.
What could be a source of resistance in a household electric circuit?
Heat
When the bulb is the resistance what this tells about the resistance?
An incandescent bulb has a filament that has a resistance. The value of the resistance determines the current that will flow for a given supply voltage. The heat generated by the current flowing through the filament gives off light. As the resistance of the filament decreases the current increases and you get more light.
Why is there zero current when a light bulb out?
there is no voltage and resistance
Are wires and a light bulb needed to make current flow?
No, not at all, current can flow between any two opposite poles. Usually a power source and wire are used, but current flows through lightning and such.
How do you work out the current of a light bulb?
You can use Ohm's Law to calculate the current of a light bulb by dividing the voltage across the light bulb by its resistance, which is typically provided on the bulb itself or its packaging. The formula is: Current (I) = Voltage (V) / Resistance (R).
If the voltage is increased and current remains the same, what happens to the resistance?
According to ohms law (R=V/I) if voltage increases the resistance also increases .For example: If voltage (V) becomes 2 times the resistance (R) also increases becomes 2 times keeping the current (I) same
Why is there zero current when a light bulb burns out?
there is no voltage and resistance
Will the current in a light bulb connected to a 200-v source be greater or less than when the same bulb is connected to a 110-v circuit?
The current in the light bulb will be greater when connected to the 200-v source compared to the 110-v circuit, assuming the resistance of the light bulb remains constant. This is because current is directly proportional to voltage in an electrical circuit according to Ohm's Law (I = V/R), so a higher voltage will result in a greater current flow through the bulb.
