Tuesday, October 17, 2017

electric circuits - Difference between I2R and V2/R and VI for measuring power P


We use I2R or V2/R or VI for measuring power P. Are all of these applicable for all circuits? I have seen in some circuit V2/R is not equal to I2R. Why is that?




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...