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A 720 W Heater Operates from a 220 V Line Voltage. Calculate: (A) the Electrical Energy Consumed by the Heater in 3 H. - Physics

Numerical

A 720 W heater operates from a 220 V line voltage. Calculate:
(a) The electrical energy consumed by the heater in 3 h.
(b) The cost of electrical energy consumption at the rate of 60 paise per kWh.

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Solution

Given, power P =720 w= 0.72 kW

Voltage, V = 220 volt

(a) Electrical energy consumed in 3 h = 0.72 x 3 = 2.16 kWh
(b) Cost of energy consumption @60 paise per kWh= 2.16 x Rs 0.6 =Rs 1.3

Concept: Concept of Current Electricity Numericals
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APPEARS IN

Frank ICSE Class 10 Physics Part 2
Chapter 4 Current Electricity
Exercise 4.2 | Q 8 | Page 187
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