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How do you find the power of a bulb when potential difference and current is given?
Wiki User
∙ 11y ago
E = Voltage of the circuit
I = Current in the circuit
R = Resistance in the circuit
Ohm's Law states that given two variables in an electric circuit, the third can be calculated:
R=E/I
I=E/R
E=I*R
Power in any circuit can be calculated by one of the following:
P=E*I
P=I2*R
P=E2/R
Wiki User
∙ 11y ago
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How much power is used by a 6 Volt battery that draws 0.5 A of current?
Power = Potential Difference (Voltage) x Current So in this case, Power = 6 x 0.5 = 3 watts
What does watt mean in science?
A unit of power, equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere.
How is potential energy converted to electrical energy?
Assuming that you are referring to electrical energy produced by power plants,where the source is water, the difference of potential represented by the difference of level, which falls down from the dam, a huge amount of water force the rotation of big turbines that generates alternating current.
What are the four main concepts of electricity?
The four main or basic concepts of electricity include current, power, and potential difference, which is the Voltage. The fourth main concept of electricity is resistance.
What is the potential difference across a 5.0 W resistor that carries a current of 5.0 A?
There's no way to tell with the given information. "5 W" tells the maximum power the resistor can dissipate without overheating and possibly becoming damaged. That rating doesn't tell you anything about the power it's actually dissipating, or its resistance. Knowing either of those numbers in addition to the current through it would allow you to calculate the voltage across the component. The voltage across it is (5 times its resistance) or (0.2 times the power it's dissipating).
What is the potential difference across a resistor that dissipates 24 W of power and has a current of 3 A?
Work it out yourself. PD=P/I, Where PD=Potential Difference, P=Power & I=Current
How do you determine the power supplied to a motor with 1.0mA of current at 3.0V potential difference?
current times voltage equals watts or power
Define watt and define ohm and define volt and define amp?
A watt is a measure of power, and a volt is a measure of electrical potential difference.A watt is a volt times an amp. Said another way, power (P, given in watts) is equal to current (I, given in amps) times voltage (E, given in volts). The formula is given here:P = I x ESee related questions below..
Why it is not correct to say that the potential difference is the work done in moving charge between the points concerned?
Voltage is defined as potential difference (units of volts). Work is equivalent to power (over time), and its' unit is joules. Power is equivalent to the potential difference times the current flow. Without current flow, there is no power, so it is incorrect to define potential difference as work. What I think you're implying is potential energy and potential difference are the same: Potential energy of a rock can be increased by raising the rock into the air. The increase of potential energy of the rock is equivalent to the real work done to raise it higher into the air. This is a true statement. Potential energy (joules) and potential difference (volts) are not equivalent, though, since potential differenence is not defined as work.
Why it is not correct to say that potential difference is the work done in moving unit charge between the point concerned?
Voltage is defined as potential difference (units of volts). Work is equivalent to power (over time), and its' unit is joules. Power is equivalent to the potential difference times the current flow. Without current flow, there is no power, so it is incorrect to define potential difference as work. What I think you're implying is potential energy and potential difference are the same: Potential energy of a rock can be increased by raising the rock into the air. The increase of potential energy of the rock is equivalent to the real work done to raise it higher into the air. This is a true statement. Potential energy (joules) and potential difference (volts) are not equivalent, though, since potential differenence is not defined as work.
What is the ratio of potential difference to the current of a circuit?
The name given by engineers to the ratio of "electrical potential difference" (expressed in volts) to "rate of current flow" (expressed in amperes) is "resistance" (expressed in ohms).
How much power is used by a 6 Volt battery that draws 0.5 A of current?
Power = Potential Difference (Voltage) x Current So in this case, Power = 6 x 0.5 = 3 watts
What is the difference between power and current?
It's the difference between pressure and flow. The pressure is measured in volts, and the current in amps.Current is the flow of electrons.Power=VIcosϕV=voltageI=currentCosϕ=cosine of angle between V and IAnswerCurrent is a drift of electric charge, expressed in amperes. Power is the rate of doing work, expressed in watts (equivalent to a joule per second).
Power needed to operate a radio that draws 3.0 A of current when a potential difference of 120 V is applied?
Power is VI so 360 watts.
Why do you have voltage on open circuit?
Voltage is simply electrical potential. You do not have to have current to have voltage, but you have to have both voltage and current in order to have power transfer.Voltage = joules per coulombCurrent = coulombs per secondWatts = Voltage times current = joules per secondAnswer'Voltage' is a synonym for 'potential difference', not potential. A potential difference exists between two points which are at different potentials due to an imbalance of their electrical charges.
Current will flow as long as the power supply is good and there's a power-control device true or false?
Current will flow as long as there is a difference of potential (a voltage) and a path for current to flow. So no power-control device is required for current flow but yes it will flow with a power control decive.
Where is the energy form a light bulb produced?
in a power station, which usually converts chemical potential energy into electrical energy, which supplies potential difference and drives current.
