Power Formula


Power Formula

The capacity to do work is termed as Energy. The Energy expended to do work in unit time is termed as Power. It is represented as P.
Power Formula is articulated as,


The Energy Consumed to do work = E
Work done = and
Time taken=

In any electrical circuit, the power is computed making use of these three formulas


In regards of Voltage and current, it is articulated as

In regards to current and resistance, it is articulated as

In regards to voltage and resistance, it is articulated as

Voltage applied across the two ends =V,

Current flowing in the circuit = I and
Resistance = R.

The Power Formula is made use of to compute the Power, Resistance, Voltage or current in any electrical circuit. It is articulated in watts.

Power Solved Examples

Underneath are some solved samples on Power which help comprehend these formulas.

Problem 1: An electric machine makes use of 300 J of energy to do work in 10s. How much power does it use?


Known: Work done = W = 300 J,
Time taken t = 10 s.

Problem 2: John is who has a mass of 60 kg runs up to 12m high in 40 seconds. Compute his power.


Known: m (mass) = 60 kg,
h (Height) = 12 m,
t (time taken) = 40 seconds.



Practise This Question

Both Arjun and Rahul went for jogging the next day and stopped at a place where kids were playing on a slide as shown below

Two slides which are directed in the two opposite directions are combined with the vertical stairs in the midway between the two sliders. The lengths of both the slides are same.

Two kids Mia and Anu reached down after sliding down. How much distance has Mia to walk from A to reach Anu who is at B if AC = 5 m and width of the stairs = 1 m?