The instrument readings obtained from open and short-circuit tests on 10kVA, 450/120V, 50Hz transformer are:
0.C. test : V= 120V; 1= 4.2A; W= 80W; W and I were in the low-voltage side.
S. C. test : V = 9.65V; 1= 22:24; W = 120W with low voltage winding short circuited. High voltag
S
Compute:
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The equivalent constants referred to the primary.
2- Efficiency for full and half-load at 0.8 p. f.
3- Maximum efficiency.
4- The voltage regulation-up for full-load and 0.8 p. f. lagging.

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.

When measuring volume, why is it important to use the correct tools and units to attain the greatest accuracy? use specific examples from the lab to support your answer. (5 points)

Write a hypothesis about the effect of increasing resistance on the current in the circuit. use theformat and be sure to answer the lesson question. “how do changes in voltage or resistance affect current in an electric circuit? ”