What is the formula for electric power?
P = VI
The electric power is given by P = VI. Where V is the potential difference, I is the electric current and P is the electric power.
What is E kQ R 2?
the magnitude of the electric field (E) produced by a point charge with a charge of magnitude Q, at a point a distance r away from the point charge, is given by the equation E = kQ/r2, where k is a constant with a value of 8.99 x 109 N m2/C2.
How do you calculate energy using power and time?
The formula that links energy and power is: Energy = Power x Time. The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.
What is W QV?
The work needed to move a charge Q from infinity to a point P where electric potential is V will be W=QV. The S.I unit of work is joule and that of the charge is coulomb.
What is V ED?
Where v=Ed where E is the Electric field between the plates ,and d is the distance or separation between the two plates.
How do you calculate the power of an energy meter?
Your electric meter records electricity usage in kilowatt-hours. In simple terms, 1 kilowatt hour = 1,000 watt-hours. For example, if you turn on a 100-watt light bulb for 10 hours, the energy usage is calculated as 100 watts x 10 = 1,000 watts (or 1 kilowatt hour).
How do you calculate power from Joules and time?
Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower.
How do you calculate W vitamin?
The electric energy delivered by an electric current is the product of its power and time over which it flows — and therefore the product of… This equation can also be combined with Ohm’s law to produce variations….Summary.
| P = VI = I2R = | V2 |
|---|---|
| R |
What is Q in W VQ?
V = W/Q. Where W = work done, Q = charge, F= coulomb force, E = electric field, r = distance, V = electric potential.