Describe the properties of magnetic flux.
What will be an ideal response?
There is no insulator for magnetic flux; it passes through all materials. Lines of force are closed loops passing through the magnet and the space around it. The loops, formed by the lines of force, tend to become larger and increase in length as they develop away from the magnet. Lines of force have direction. They emerge from the N pole and enter the S pole. Lines of force never cross one another. Lines of force concentrate at the poles and develop maximum field strength there. Large numbers of flux lines are easily established in magnetic materials, but are difficult to establish in nonmagnetic materials such as air.
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The length of the estrous cycle in hogs and cattle is the same
Indicate whether this statement is true or false.
The reason for using zone valves on a hydronic heating system is to ____.
A. allow different areas of the structure to maintain different temperatures B. reduce the chance of a water leak C. prevent unused parts of the house from getting warm, and wasting energy D. both a and c
A 1200/240-V rms transformer has impedance 60?-30°? on the high-voltage side. If the transformer is connected to a 0.8?10°? load on the low-voltage side, determine the primary and secondary currents.
What will be an ideal response?
If the coil winding direction is not called-off on the drawing, it will be manufactured as:
A. left-hand winding B. right-hand winding C. the same as other springs in the drawing D. none of the above