Relation Between Watt and Volt - Formula, FAQs

Relation Between Watt and Volt - Formula, FAQs

Edited By Vishal kumar | Updated on Sep 24, 2024 05:25 PM IST

Watt and volt are two most commonly used key terms in physical sciences and branches related to the same. For someone who is at the beginning of exploring this subject, these two terms might be a bit confusing and they might stumble on questions like what is watt and volt? What is watt formula? How to convert volts to watts or watts to volts? How can we explain the difference between watt and watt hour? How to understand the relation between watt and volt? What is electricity watt that we often talk about in day to day life? What is the difference between watts and volts? Or how many watts in a volt are present? Don’t worry we got you covered! We will cover not just these questions but also the difference between volts and amps, relation between power, voltage and current, volts amps watts, relation between power and voltage.

This Story also Contains
  1. What is watt?
  2. What is volt?
  3. Difference between volt and watt
  4. Volts vs amps
  5. Watts vs amps
Relation Between Watt and Volt - Formula, FAQs
Relation Between Watt and Volt - Formula, FAQs

Before moving onto the volt and watt difference, we need to first define the term watt and volt.

What is watt?

Watt is a unit of measuring power. Watt is named after an eighteenth century Scottish inventor, James Watt. Watt is equivalent to kg⋅m2⋅s−3 and also equivalent to Joule/sec. The symbol of watt is W.

Also read -

What is volt?

Volt is a unit of measuring electric potential, electromotive force and electric potential difference; also called voltage. Volt was named after Alessandro Volta, an Italian physicist. Watt is used to measure the rate of energy transfer.

Watt formula

We could also define the term watt as the rate at which work is done when an object with constant velocity of one meter per second is held against an opposing constant force on one newton.

Watt = Joule / sec = Nm / sec = kg.m2 / s3

In electromagnetism, when a current of one ampere flows through a potential difference (voltage) of one volt, the rate at which electrical work is done is said to be one watt.

Thus, the volts amps watts formula can be written as,

Watts = volts x amps

This formula is used to convert watts to volts and explains the power and voltage relation. This is how we can replace volts and amps to watts. This also gives the relation between v and w.

1 W = V2 / Ω = 1 A2Ω

Here Ω is the unit of resistance.

Volt formula

When an electric current of value one ampere expends one watt of power between two points of a conducting wire, the electric potential developed between these two points is said to be one volt. In other words, volt is the potential difference between 2 points that expend one joule of energy when one coulomb of charge passes through these two points. Volt can be expressed as:

V = J/C = kg.m2 /A.s3

Volt can also be expressed in ampere x ohm, Webbers / sec, watts / ampere, or Joules / coulomb.

Difference between volt and watt

Parameters
Watts

Volts

DefinitionSI unit of power.SI unit of potential difference and electromotive force EMF
FormulaWatts = volts x ampsV = Joules / Coulomb
UnitPowerEMF & voltage
SymbolWV
MeasurementGives realistic measurement of powerGives small portion of voltage from source
Measurement difficultyDifficultEasy
Measuring devicePower meterVoltmeter
Unit derived from SI unitskg.m2 / s3kg.m2 /A.s3
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This table describes the difference between volt and watt. Now let’s discuss the difference between watts and amps and the difference between volts and amps.

Volts vs amps

Volt
Ampere
SI unit of potential difference and electromotive force.SI unit of current.
Symbol is V.Symbol is A.
V = Joules / CoulombA = charge / sec
Measured by voltmeter.Measured by ammeter.
In base unit it is kg.m2 /A.s3Ampere is the base unit itself.

Also Read:

Watts vs amps

Watt
Ampere
SI unit of power.
SI unit of current.
Symbol is W.Symbol is A.
Watts = volts x ampsA = charge / sec
Measured by Power meterMeasured by ammeter.
base unit it is kg.m2 / s3Ampere is the base unit itself.

Some conversions

  1. 1 volt watt – to write 1 volt in watt following formula, Watts = volts x amps.
  2. 1 ampere watt - to convert 1 ampere into watt following formula is used Watts = volts x amps.
  3. Kw to volts – 1000 W = 1 kW.

These conversions give the relation between power voltage and current.

Also check-

NCERT Physics Notes:

Frequently Asked Questions (FAQs)

1. 1 volt is equal to how many watts?

To convert 1 volt into watt the following formula is used Watts = volts x amps.

2. What is watts in electricity?

Watt is a unit of measuring power. Watt is named after an eighteenth century Scottish inventor, James Watt. Watt is equivalent to kg⋅m2⋅s−3 and also equivalent to Joule/sec. The symbol of watt is W. 

3. How to find watts when voltage and current is given?

Watts = volts x amps is the formula used to establish a relationship between watts, volts and ampere. Since, volt is the SI unit of voltage and ampere SI the unit of current. The product of values of amperes and volts will be equal to watt or power of the system.

4. Write: a. Watts to volts formula b. Power and current relation

In electromagnetism, when a current of one ampere flows through a potential difference (voltage) of one volt, the rate at which electrical work is done is said to be one watt.


Thus, the volts amps watts formula can be written as,


Watts = volts x amps


This formula is used to convert watts to volts and explains the power and voltage relation. This is how we can replace volts and amps to watts.


Volt can also be expressed in ampere x ohm, Webbers / sec, watts / ampere, or Joules / coulomb.

5. What is volt amp?/What is a volt amp?

To measure the apparent power in an electric circuit (usually AC circuits), the unit volt-ampere is used. 

6. Difference between watt and watt hour?

Power = work / time 


Watt hour is the unit of work whereas watt is the unit of power.

7. What is electricity watts conversion?

One unit of electricity means one kilowatt hour of electricity.

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