V i x r voltage current x resistance. The unit for kinetic energy is the same unit for work the joule.
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The two most important equations in electricity are given below.
Work formula physics electricity. For the potential energy the formula is. Keep the following equations handy as you study these topics. This association is the reminder of many often used relationships.
The work energy theorem can be derived from newton s second law. In physics we can define energy as the capacity to do work. The various electrical formulas and their derivations are as follows.
W δke 1 2mv2 f 1 2mv2 i w δ ke 1 2 mv f 2 1 2 mv i 2. Where v stands for an object s velocity. Work transfers energy from one place to another or one form to another.
Other equations that you should know include. P v x i power voltage x current. Ep 1 2 k x k is the spring constant and x is the amount of compression or streching.
Ke 1 2 kg v2. P e t power energy time. E v x q energy voltage x charge.
The unit of power is watt w. In other words the change in kinetic energy of a body is equal to the amount of work done on that body. Electric power is a widely used term in physics as you must be aware of.
The work w done by the net force on a particle equals the change in the particle s kinetic energy k e. These formulas show that work is the energy associated with the action of a force so work subsequently possesses the physical dimensions and units of energy. Electricity and magnetism make up one of the most successful fields of study in physics.
When working mathematically with electricity and magnetism you can figure out the force between electric charges the magnetic field from wires and more. The relationship between volt watt and ohms is below volts square root of watts ohms the relationship between volts watts and amperes is as follows. Similarly you will learn about the electric power formula in detail over here.
E v x i x t energy voltage x current x time. Power can be defined as the rate at which work is done i e. In physics work is the energy transferred to or from an object via the application of force along a displacement.
The work energy principles discussed here are identical to. The si unit of energy is joules j which is named in honour of james prescott joule. Q i x t charge current x time.
Moreover it is a very important thing that allows us to see the rate at which electrical energy transfers from an electric circuit. The electric field is by definition the force per unit charge so that multiplying the field times the plate separation gives the work per unit charge which is by definition the change in voltage. Pe mg h m is the mass g is the gravitational acceleration and h is the distance potential energy of the spring.
W v x q work voltage x charge. The formula for power is. In general the formula for the kinetic energy of an object is.
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