Question

A Radio Set of 60Watts Runs for 50hours How many units in (KWhr) of electrical energy are consumed ​

Answer 1

Given

• Power (Radio Set) = 60 Watt
• Time = 50 hours

To Find

• Electrical Energy consumed

Solution

☯ E = P × t

• Where P is in kW and t is in hours

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✭ Converting Units :

➞ Power = 60 W

• 1 kW = 1000 W

➞ Power = 60/1000

➞ Power = 0.06 kW

✭ Electrical Energy Consumed :

➞ E = P × t

• E = Electrical Energy = ?
• P = Power = 0.06 kW
• t = Time = 50 hours

➞ E = 0.06 × 50

➞ E = 3 kWh

∴ The Electrical Energy consumed is 3 kWh

Answer 2

Answer:

Given :-

• Power = 60 W
• Time = 50 hours

To Find:-

Energy consumed

Solution :-

E = P × T

E is the Energy

P is Power

T is the Time

E = 60 × 50

E = 3000 W

Now,

We can also write as

1000 W = 1 KW

3000 W = 3000/1000 = 3 kWh