Question

An electric bulb is rated 250v, 8A. if this bulb is used for2. 0 hours, calculate the amount of electrical energy consumed

Answer 1

Answer:

14400 KW

Explanation:

see the attachment for your answer.

Answer 2

ANSWER:

The electrical energy consumed by the bulb is 14.4 MJ.

EXPLANATION:

The electrical energy consumed is the measure of power utilized by the electrical instrument in a given period of time. The electrical power is defined as the "amount of work done" per "unit time" to transfer the electrical energy.

As

Power=Voltage*Current  

So

 Electrical energy consumed=Power*Time=Voltage*Current*Time

In the present case, the bulb is utilizing 250 V voltage and 8 A current, so when it is used for 2 hrs, the electrical energy consumed will be  

 Electrical energy consumed=Power*Time=Voltage*Current*Time

Electrical energy consumed=250*8*2

Electrical energy consumed=4000=4 kWh

We know that

 1 k W h=3.6 * 〖10〗^{6}J

So

 \text { Electrical energy consumed }=4 * 3.6 * 10^{6}=14.4 \mathrm{MJ}

So the electrical energy "consumed by the bulb" is 14.4 MJ.