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A Bulb is Rated as 250 V; 0.4 A. Find Its : (I) Power, and (Ii) Resistance. - CBSE Class 10 - Science

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Question

A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.

Solution

Given:
              V = 250 V
               I = 0.4 A

Power, P = VI
               = 250 x 0.4
               = 100 W
 
Resistance, R = `R=P/(I2) `

                    = `100/(0.4)^2`       
                  = 625 Ω

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Solution A Bulb is Rated as 250 V; 0.4 A. Find Its : (I) Power, and (Ii) Resistance. Concept: Electric Power.
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