g Part A – Rectangular Electrodes Draw 6 to 9 electric field lines: starting at the positive electrode and stopping at the negative electrode, draw the electric field lines in such a way that they always intersect equipotential lines at right angles. The electric field lines should be drawn through the region between and the regions immediately above and below the electrodes. Use arrows along the electric field lines to show the direction of the electric field. Determine the magnitude of the electric field along the segment between the electrodes by using Equation 2-5 and the boundary conditions that the potential is either 0.0 V or 15.0 V at the negative or the positive electrode respectively. Find the average of the electric field values – this will be the average value of E that exists between the electrodes. Calculate the (sample) standard deviation, σ. Report the value of the electric field as:

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.