Power of electric appliance = 100 W = 0.1KW;
Time used = 3 hrs ;
Energy = power × time taken ;
= 0.1 ×3 = 0.3 KWh = 0.3 units ; ( 1KWh = 1 units)
Hence, the units of energy consumed per day =0.3 units and for a month = 0.3 × 30 = 9 units.... hope it'll help u... :)

Energy Consumed by an Electric Appliance

Introduction:
In this explanation, we will calculate the energy consumed by an electric appliance that operates for 3 hours per day. We will determine the units of energy consumed per day and for a month.

Given Information:
- Power of the electric appliance: 100 watts (100W)
- Operating time per day: 3 hours

Calculating Energy Consumed per Day:
To calculate the energy consumed per day, we can use the formula:

Energy (in watt-hours) = Power (in watts) × Time (in hours)

Substituting the given values:

Energy per day = 100W × 3 hours
Energy per day = 300 watt-hours (Wh)

Converting Energy to Units:
Electricity is commonly billed in units, where 1 unit is equivalent to 1 kilowatt-hour (kWh). To convert watt-hours to units, we need to divide the energy by 1000.

Energy per day (in kWh) = 300 Wh ÷ 1000
Energy per day (in kWh) = 0.3 kWh

Therefore, the electric appliance consumes 0.3 units of energy per day.

Calculating Energy Consumed for a Month:
To determine the energy consumed for a month, we need to multiply the energy consumed per day by the number of days in a month. Assuming a month has 30 days:

Energy per month (in kWh) = Energy per day (in kWh) × Number of days in a month
Energy per month (in kWh) = 0.3 kWh × 30
Energy per month (in kWh) = 9 kWh

Therefore, the electric appliance consumes 9 units of energy per month.

Conclusion:
The electric appliance with a power of 100W, when used for 3 hours per day, consumes 0.3 units of energy per day and 9 units of energy per month. It is important to consider these energy consumption values when monitoring electricity usage and managing energy costs.