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# In Which of the Following Cases More Electrical Energy is Consumed per Hour? (I) a Current of 1 Ampere Passed Through a Resistance of 300 Ohms. (Ii) a Current of 2 Amperes Passed Through a Resistance of 100 Ohms. - CBSE Class 10 - Science

#### Question

In which of the following cases more electrical energy is consumed per hour?

(i) A current of 1 ampere passed through a resistance of 300 ohms.
(ii) A current of 2 amperes passed through a resistance of 100 ohms.

#### Solution

(i) I = 1 A
R = 300 Î
t = 1 h
Electrical energy consumed = I^2xxRxxt
= (1)2 (300) (1)
= 300 Wh
(ii) I = 2 A
R = 100 Î
Electrical energy consumed =  I^2xxRxxt=(2)^2(100)(1)=400Wh

Thus, more electrical energy is consumed in case (ii).

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Solution In Which of the Following Cases More Electrical Energy is Consumed per Hour? (I) a Current of 1 Ampere Passed Through a Resistance of 300 Ohms. (Ii) a Current of 2 Amperes Passed Through a Resistance of 100 Ohms. Concept: Electric Current and Circuit.
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