Question
Mon September 14, 2009 By:

TO PROPORTIONALITY QUESTION

Expert Reply
Tue September 15, 2009

When we find current is directly propotional to voltage, the propotionality constant is distinct physical quantity called resistance which is not equal to POWER.

Again multiplying current and voltage gives us another physical quantity called power. If you change either current or voltage then power changes. This means it can't be taken as propotionality constant.

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