Energy Voltage Current Equation

Power p e t where power p is in watts power p work time w t.

Energy voltage current equation. Electric energy is e p t measured in watt hours or also in kwh. 1j 1n m 1w s power formula 2 mechanical power equation. Voltage current power and energy. Phase angle between voltage and amperage.

Relationship between energy transferred current voltage and time the potential difference or voltage v across two points is defined as the energy e dissipated or transferred by a coulomb of charge q that moves through the two points. The defining equation for this is v w q. Therefore potential difference current is the rate of charge flow. 1ma 0 001a and 1mw 0 001w.

The potential difference is often referred to as voltage between these points. V voltage in volts w energy in joules q charge in coulombs also learn other basic units. To calculate voltage v. V the voltage in volts.

The amp is quite large for electronics so we often measure current in milliamps ma and power in milliwatts mw. 50 j energy is required to move a charge of 2 c from one point to other. Ohm s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. So voltage is energy transferred divided by charge.

Energy e is in joules and time t is in seconds. Current is the rate of charge flow. W energy in joules. In this analogy charge is represented by the water amount voltage is represented by the water pressure and current is represented by the water flow.

Put your finger over v this leaves p over i so the equation is v p i. Where i is the current through the conductor in units of amperes v is the voltage measured across the conductor in. Energy transferred 120 2 240 j this equation can be rearranged to v e q. Introducing the constant of proportionality the resistance one arrives at the usual mathematical equation that describes this relationship.

The rearranged formula means we can define one volt as one. To calculate current i. 1 w 1 j s. Find the voltage between two points.

Voltage is represented in equations and schematics by the letter v. When describing voltage current and resistance a common analogy is a water tank. The potential difference or voltage v across two points is defined as energy e dissipated or transferred by coulomb of charge q that moves through the two points. Equation 3 shows that the product of the instantaneous voltage and current results in the instantaneous power p t if these instantaneous powers multiplied by the infinitely small time dt are continuously summed it will return the energy in the system since t 0 s.

So for this analogy remember. Potential difference electrical energy dissipated charge v e q 2.