Why emf is measured in open circuit?

Emf is measured in open circuit because it is the potential difference of a source when no current is flowing.

Explanation:

true tan speed = ang vel x radius

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card