2.65 in a standard tensile test a steel rod of 22-mm diameter is subjected to a tension force of 75 kn. knowing that n 5 0.30 and e 5 200 gpa, determine (a) the elongation of the rod in a 200-mm gage length, (b) the change in diameter of the rod.

To solve this problem it is necessary to apply the concepts related to uniaxial deflection for which the training variable is applied, determined as

Where,

P = Tensile Force

L= Length

A = Cross sectional Area

E = Young's modulus

PART A) The elongation of the bar in a length of 200 mm caliber, could be determined through the previous equation, then

Therefore the elongaton of the rod in a 200mm gage length is

PART B) To know the change in the diameter, we apply the similar ratio of the change in length for which,

Where,

Poission's ratio

= Lateral strain

= Linear strain

Therefore the change in diameter of the rod is

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

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