Calculate the electrical energy in unit consumed by 500 watts lamp for 5 hours mcq
Answers
Answer:
2.5 units
Explanation:
p=w*t
500*5W= 2500W
1kWh=1 unit
1000W=1kWh
2500W=2.5kw
2.5 units of electricity is consumed.
2.5 units of electrical energy has been consumed.
Given : 500 watts lamp for 5 hours
To find : The electrical energy consumption.
Solution :
We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the electrical energy consumption)
Here, we will be using the following mathematical formula.
Energy = Power × Time
By, putting the available data we get :
Energy = 500 × 5 = 2500 Wh
Now,
1000 Wh = 1 kWh
1 Wh = (1/1000) kWh
2500 Wh = (2500/1000) kWh
2500 Wh = 2.5 kWh
Now, we know that :
1 kWh = 1 unit
So,
2.5 kWh = (1×2.5) units
2.5 kWh = 2.5 units
So, electrical energy consumption = 2.5 units
Hence, 2.5 units of electrical energy has been consumed.