What are the 3 formulas for power?
P = R × I2 or V2/ R: These formulas are a variant of ohm’s law. Here R stands for resistance, V stands for potential difference and I stands for current. It states that power is directly proportional to the square of potential difference and inversely proportional to the resistance offered by the conductor.
What is the formula for work and power?
Work and Power Difference in Tabular Form
| Criteria | Work |
|---|---|
| Formula | Total Work Done (W) = Power (P) x Time (t) or Work = Displacement x Force |
| Measurement Unit (SI unit) | The standard unit of work is the Joule denoted as (J). Furthermore, you can measure work in electron volt (eV), kWh, GWh, and MWh |
What is the formula between energy and power?
So joules per second is one expression of power. If you divide energy by time, you get power. P = E/t. You can rearrange that equation in a few ways.
What are the formulas for calculating work energy and power?
The SI unit of power is Watt (W) (which is calculated as joules per seconds). Earlier, power also referred to activity. It is a scalar quantity. The equation to measure power is P = W/t….Difference Between Work and Power.
| Work | Energy |
|---|---|
| Work = force * distance | There are different equations of energy depending on its kind. |
Is power equal to energy?
Energy and power are closely related but are not the same physical quantity. Energy is the ability to cause change; power is the rate energy is moved, or used.
What is the formula for charge flow?
In metal conductors the charged particles are free electrons. The electrons are free to move from one ion to another and a net flow of these electrons in one direction is an electric current….The relationship between current I and quantity of charge Q.
| I = | I = Q ÷ t |
|---|---|
| Q = It | Q = I x t |
| t = | t = Q ÷ I |
What is work with formula?
To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd. If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.
What are the formulas for work energy power?
Formula Sheet for Work Energy Power. 1. Work done by constant force. W = Force × Component of displacement along force. = displacement × Component of force along displacement. W = FS cos θ ( θ is angle between F → and S →) W = F → ⋅ S → S=r2-r (, S → = r 2 → − r 1 →, displacement vector Δ r →. 2.
How to calculate the energy of a wave?
For a sinusoidal mechanical wave, the time-averaged power is therefore the energy associated with a wavelength divided by the period of the wave. The wavelength of the wave divided by the period is equal to the velocity of the wave, P ave = E λ T = 1 2 μ A 2 ω 2 λ T = 1 2 μ A 2 ω 2 v. 16.10
How to calculate the kinetic energy of work?
1. Work done by constant force 2. Work done by a variable force 3. Work done by spring force W = – [ 1 2 kx 22 – 1 2 kx 12] If x 1 = 0 and x 2 = x. Then W = 1 2 kx² 4. Energy Kinetic Energy = 1 2 mv² = p 2 2 m 5. Work – energy theorem 6.
Which is the correct formula for potential energy?
Formula: For the potential energy the formula is. P.E. = mgh: Unit : The SI unit of energy is joules (J), which is named in honour of James Prescott Joule. Power: Definition: Power can be defined as the rate at which work is done i.e. energy converted. Formula: The formula for power is. P = W/t: Unit : The unit of power is watt (W).