Question

an electrical heater is rated at 1.5 kw . How much of energy does it use for 5 hours ? ​

Answer 1

Answer :-

• The energy supplied by the electric heater is 7500kWh.

Explanation:

To Find :-

• Energy supplied by the electric heater.

Solution:

Given that,

• Power of the electric heater = 1.5kW
• Given time = 5 hours

Converting 1.5kW to W,

=> 1.5 × 1000

=> 1500 W

So, The energy supplied by the heater is,

As we know that,

E = P × t,

Where,

• E = Energy
• P = Power
• t = Time

=> Energy = 1500 × 5

=> Energy = 7500

Hence,

The energy supplied by the electric heater is 7500kWh.

Know more :-

• Power = Energy supplied ÷ Time
• 1 W = 1 Js·¹
• The S.I. unit of work is Joule ( J ).
• The S.I. unit of power is Watt ( W ).