Power = voltage x current x power factor.
In DC, the power factor is one, so you can omit it. In AC, depending on the circuit elements used, the power factor is quite often so close to one that you can omit it as well.
Well maybe the best way to answer this is to try to understand it through mathematical equations. I = E/R wheras I = current E=Voltage R = Resistance
This is "Ohm's Law" in its principle form.
Current is in direct relation to Voltage but also in direct relation with resitance and vise versa. By using the formula you could plug in a known voltages and divide it by known resistances and get the current in amperes.
Think of current and voltage as a moving stream of water, the actual flow of water is the curent, but the force behind it causing the flow or "Push" is the voltage pressure
Here are two commonly used formulae that relate the two:
1) V=IR (Ohm's law; voltage = current x resistance). You can consider the current as the dependent variable: if you have a certain voltage and a certain resistance, the current that will flow is dependent on both (I = V/R).
2) P=IV (power transferred is the product of current of current and voltage).
v=IR
since there's no concept of phase angle there won't be cos pi included.
just voltage is equal to current multiplied by path resistance.
power = voltage * current
P=V*I
V=i x r
Current and Voltage are directly proportional. V=voltage, I=current, R=resistance V=I*R
Ohm's Law: voltage = current * resistance. If resistance is a constant, then voltage is directly proportional to current.
Voltage is a property of electrical potential. Amperes (and miliamperes) are the units of electrical current. Even though these are related to each other in a circuit, they are not the same thing, and they cannot be "converted" into each other.Also, these properties are only related through a "load" the circuit provides (the resistance and inductance of the circuit), and make sense only when related to each other this way. If there is current, there will be voltage as well, but if there's only voltage, there will be no current unless there is some resistance as well (even a wire has resistance) - otherwise the circuit is "open" and no charge is flowing.In a simple circuit with a voltage source and resistor:milliamps = voltage*1000/resistance.If your circuit has diodes, capacitors, inductors, etc. it gets much more complicated.
I = E/R If resistance is constant, then current is directly proportional to voltage. Double the voltage ===> the current will also double.
Voltage x current = power (watts)
Current and Voltage are directly proportional. V=voltage, I=current, R=resistance V=I*R
in ac circuits power,P=VICOS@ @ is the angle between voltage and current. in dc P=VI V is the voltage I is the current. Power (in Watts) is current (A) x voltage (V)
Current, voltage and resistance are related by the Ohm's law formula which states that current is directly proportional to the applied voltage and inversely proportional to the resistance at a constant temperature. Stated mathematically: I = E/R where I = current in amperes, abbreviated to A E = voltage in volts, abbreviated to V R = resistance in ohms, usually signified by the Greek omega Ω
Power (watts) is voltage times current.
Voltage and current are two different things. Voltage is the electric potential difference between two points. Expressed in volts, it is also joules per coulomb. Current is the charge flow past a point. Expressed in amperes, it is also coulombs per second. You can relate voltage and current using Ohm's Law, which states that voltage is equal to current times resistance. Resistance is, therefore, equal to voltage divided by current. Using base units, resistance is equal to joules per coulomb divided by coulombs per second, which simplifies to joule-seconds per coulomb squared. That is a difficult unit to write, so we just use ohms as the unit.
Resistance = Current x Voltage This is commonly written R = IV note: this means (ohm)=(coulomb/second)(volt)
1). Voltage = (resistance) x (current)2). Current = (voltage) / (resistance)3). Resistance = (voltage) / (current)I think #2 is Ohm's original statement, but any one of these can be massaged algebraicallyin order to derive the other two.
Current (amperes) is the rate of flow of electric charge, in coulombs per second. Voltage, on the other hand, is the electric potential of that charge, in joules per coulomb.Current and voltage are related to resistance by Ohm's Law, which states that voltage is equal to current times resistance.There is a tendency to misuse the term "current", and to apply it, for instance as "an electric current of 120 volts". This usage is incorrect. Current is current, and voltage is voltage, as noted above.
in ac circuits power,P=VICOS@ @ is the angle between voltage and current. in dc P=VI V is the voltage I is the current. Power (in Watts) is current (A) x voltage (V)
both cannot exists if either one is missing.
the answer is current, voltage, and resistance
Voltage, current, and resistance can be related by this formula. V = iR, where I is the current. Assuming that the voltage stays constant, current will decrease. Hope this helps!