When the normal stresses are at their maximum or minimum values, the shear stresses are zero. We can use the Mohr's circle to determine multiple loading conditions. Principals Stresses always occur when the stress element is rotated such that the shear stresses are 1. In columns, cross-sectional is selected such that the allowable stress is not exceeded, and the deformation falls within specifications. In buckling loads of columns, if I increase the length of an element, the critical load will decrease. In buckling loads of columns, if I increase the inertia of an element, the critical load will decrease. The fixed-pinned end condition provides the greatest effective length of a column. The pinned-pinned end condition provides the lowest effective length of a column. In stress transformations, for certain angles, the normal stress will reach maximum and minimum values, and that these maximum and minimum values are separated by an angle of 90 degrees. Mohr's circle is a method to facilitate the determination of normal and shear stresses for different orientations of the 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. stress element.

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Electric Current, Voltage and Electric Power

The term electric current is the flow of electrons or electric charges. The drift of electrons is proportional to the amount of voltage or potential difference applied. The more is the voltage, the more will be the electron drift. The amount of electric current a circuit possesses is proportional to the density of electrons or electric charge.