Question

An electrical heater rated 1500 W operates 2 hours per day. What is the electrical energy energy consumed

Answer 1

Answer:

1500W ”(2)

Explanation:

The relation between power and energy is

Energy = Power x Time

If, Power = 1500 Watt, Time = 10 Hour

Energy = 1500 Watt x 10 Hours = 15000 Watt-hr

Answered on: 2016/07/11 by ExamFear Share on Facebook Share of TwitterReport Abuse

Power= 1500w=1500/1000=1.5kw Time=10 hours Energy=power×time 1.5×10 =15kW

Answer 2

Given:

Power rating of electrical heater = 1500 Watt

Time for which heater operates per day = 2 hours

To find:

Electrical energy consumed by heater = ?

Step-wise solution:

Let's start with a basic understanding of electrical energy.

The entire quantity power consumed by electrical equipment over the time they are in use is referred to as electrical energy.

To calculate electrical energy apply the following formula:

Electrical energy = Power × Time

                            = 1500 Watt × 2 hours

                            = 3000 Wh

Electrical energy is expressed in kilowatt-hour (KWh).

We know that,

1000 Wh = 1kWh

∴ 3000 Wh = ?

Electrical energy (KWh) = (3000 Wh × 1 kWh) ÷ 1000

                                       = 3 × 1 kWh

                                       = 3 kWh

Hence, the elecrtical energy consumption of electrical heater is 3 kWh per day.