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# Electric Power Assignment Help

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Electromagnetism - Electric Power

The rate at which electric work is done by the source of in maintaining the current in electric circuit is called electric power of the circuit.

If a current I ampere flows through a conductor of resistance R for a time t second under a potential difference of V volt then electric work done to maintain the current is given by

**W = Vt joule**.

**∴ Electric power , P = W / t = VIt / t = VI watt or Js**^{ - 1 }

**Power (in watt) = V (in volt) x 1 ( in ampere)**

If, **V = 1V **

And **I = 1 A **

Then **p = 1 watt.**

**∴ 1 watt = 1 V x 14 = 1 ampere-volt**

Thus the power of an electric circuit is said to be one watt if one ampere current flows in it against a potential difference of 1 volt.

Bigger units of power are kilowatt (KW) and mega watt (MW).

Where** 1 kW = 1000W**

And **1 MW = 106 W.**

Commercial unit of power is horse power (H.P) where **1 HP = 746 watt.**

As **V = IR or I = V / R, so**

P =** VI = I**_{2}R = V_{2}/R

The source of this power is an external source to keep a steady current through the conductor. In a simple circuit where the current is supplied to a conductor by the cells, it is the chemical energy of the cells which supplies this power for as long as it can.

A bulb of **484 O** is producing light when connected to **220 V** supplies what is the electric power of a bulb?

Electric power

**P = V**_{2} /R = (220)^{2} / 484 = 100 watt.

How much current is drawn by the motor of 0.5 H.P from 220 volt supply?

**P = 0.5 H.P = 0.5 x 746 watt **

I = p / V = 0.5 x 746 / 220 = 1.7A

ExpertsMind.com - Electric Power Assignment Help, Electric Power Homework Help, Electric Power Assignment Tutors, Electric Power Solutions, Electric Power Answers, Electromagnetism Assignment Tutors

If a current I ampere flows through a conductor of resistance R for a time t second under a potential difference of V volt then electric work done to maintain the current is given by

**W = Vt joule**.

**∴ Electric power , P = W / t = VIt / t = VI watt or Js**

^{ - 1 }

**Power (in watt) = V (in volt) x 1 ( in ampere)**

If,

**V = 1V**

And

**I = 1 A**

Then

**p = 1 watt.**

**∴ 1 watt = 1 V x 14 = 1 ampere-volt**

Thus the power of an electric circuit is said to be one watt if one ampere current flows in it against a potential difference of 1 volt.

Bigger units of power are kilowatt (KW) and mega watt (MW).

Where

**1 kW = 1000W**

And

**1 MW = 106 W.**

Commercial unit of power is horse power (H.P) where

**1 HP = 746 watt.**

As

**V = IR or I = V / R, so**

P =

**VI = I**

_{2}R = V_{2}/RThe source of this power is an external source to keep a steady current through the conductor. In a simple circuit where the current is supplied to a conductor by the cells, it is the chemical energy of the cells which supplies this power for as long as it can.

A bulb of

**484 O**is producing light when connected to

**220 V**supplies what is the electric power of a bulb?

Electric power

Electric power

**P = V**

_{2}/R = (220)^{2}/ 484 = 100 watt.How much current is drawn by the motor of 0.5 H.P from 220 volt supply?

**P = 0.5 H.P = 0.5 x 746 watt**

I = p / V = 0.5 x 746 / 220 = 1.7A

I = p / V = 0.5 x 746 / 220 = 1.7A

ExpertsMind.com - Electric Power Assignment Help, Electric Power Homework Help, Electric Power Assignment Tutors, Electric Power Solutions, Electric Power Answers, Electromagnetism Assignment Tutors