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A bulb is rated 40W; 220V. …

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A bulb is rated 40W; 220V. Find the current drawn by it , when it is connected to a 220V supply. Also find its resistance. If the given bulb is replaced by a bulb of rating 25W; 220V, will there be any change in the value of current and resistance? Justify your answer and determine the change.

Posted by Ojal Gupta 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Kishor Shinde 4 years, 11 months ago

Gallium

0Thank You

Poulami Dasgupta 4 years, 11 months ago

Power(P) = IV 40 = I x 220 40/220 = I 0.1818..= I Resistance( R) = V/ I = 220/ 0.1818 = 1210ohms

0Thank You

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