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The commercial unit of electrical energy used is kilowatt hour which is energy consumed by an electric appliance of power one kilowatt in one hour. But the smallest commercial unit of electrical energy used is watt hour which is energy consumed by an electric appliance of power one watt in one hour.

## Which unit of energy is smallest value?

The Planck constant is. J s. Planck’s constant represents the smallest energy unit, which moves at the speed of light; it is a **photon**.

## What are small units of electricity?

Electricity explained Measuring electricity

Electricity is measured in units of power called **Watts**, named to honor James Watt, the inventor of the steam engine. A Watt is the unit of electrical power equal to one ampere under the pressure of one volt. One Watt is a small amount of power.

## What is the cost of 1 unit of commercial electricity?

The tariff for monthly consumption of 101–200 units will go up from ₹7 to **₹7.10 per unit**, and for above 200 units from ₹8.05 to ₹8.15 per unit. The increase in tariff for LT and HT industrial consumers across the State is 10 paise per unit.

## What is the other name of commercial unit?

**Kilowatt-hour** is the commercial unit of electrical energy. The other name used for it is units. Here J represents Joules and h represents hour and s represents seconds.

## What is a unit of energy called?

The SI unit of energy/work is **the joule (J)**, named for English physicist James Prescott Joule (1818 – 1889). … One joule equals the work done by a force of one newton moving an object one meter (J = N · m).

## How is electricity calculated?

If you use 1000 Watts or 1 Kilowatt of power for 1 hour then you consume 1 unit or 1 Kilowatt-Hour (kWh) of electricity. So the reading on the electricity meter represents the actual electricity used. … **100 x 10** = 1000 Watt-Hour = 1 Kilowatt-Hour (kWH) = 1 units (on your meter).