Phy-112 lab 3 resitance Kyle Pfannkuch

Electrical Engineering What is the smallest square box that will accommodate four No. 12 conductors and four No. 10 conductors if a. These conductors are pulled through without a splice? b. These conductors are all spliced in the box?

Pls, answer no.1 and 2 (show the complete solution and round off final answers to 4th decimal) (write properly pls)

A cable one mile long and 0.50 inch in diameter is composed of a steel core 0.25 inch in diameter and the is Ps and Pa 57.4 and 17.5 ohm Cmil/ft, outside shell is aluminum. The resistance of the cable is respectively a. 0.447 ohm c. 0.625 ohm b. 0.893 ohm d. 5.3 ohms

.________ is a term used to describe a material's ability to retain magnetism. a) Coercive force b) Retentivity c) either "a" or "b" d) neither "a" nor "b" A coercive force is desirable in materials that is intended to be used as temporary magnets. a) low b) high c) extremely high d) any of the above A) Upon what does the electroniagnetic strength of an air-cored coil depend? a) number of turns in the coil b) amount of current flowing through the coil c) both "a" and "b" d) neither "a" nor "b" B) Upon what does the electromagnetic strength of an iron-cored coil depend? a) amount of current flow b) number of turns c) permeability of the core d) all of the above The left hand rule for a coil is such that if you were to hold a coil in your left hand with your fingers pointing in the direction of electron flow, your thumb would point in the direction of the a) electron flow b) lines of flux c) north pole face d) none of the above

Current in a wire with open ends. Which of the following types of current can flow through a straight metallic wire of finite length (wire with open ends)? (A) Time-invariant current. (B) Slowly time-varying current. (C) Rapidly time-varying current. (D) Any time-varying current. (E) Any current. (F) None of the above.

5. Assignment 1: Derive the microscopic model of current. Explain each step carefully with diagram. Hand written. Explain the Random, and drift velocity. Give values.

We are running 3 wires and a ground in a RMC to a control panel with a 60 amp circuit breaker disconnect in the control panel. The conduit is run along the ceiling where the ambient air temperature is 100 degrees. The control panel feeds our secondary cooling pump. What size are the ungrounded conductors? All conductors have typeTHHN insulation. A   #6 AWG B   600 Kcmil C   #8 AWG D   #2 AWG What size RMC do we need? A   3" B   3/4" C   1" D   1 1/2"

Fill in the correct answers. Two like poles within magnetic reach of each other The magnetic force on a bar magnet is strongest at the. they leave the pole. Magnetic lines have pole and enter the. Magnetic field may be also called The unit of magnetic field is or IWebber is the unit to measure and equal lines.

QUESTION 7 Match Collumn A and Collumn B? Properties of Metal v Britleness A. the property of a metal which allows little bending or deformation without shattering Conductivity B. the property of metal to resist deformation and stress without breaking the property of a metal which can be hammered, rolled. or pressed into various shape without C. v Hardness cracking, breaking or leaving some other detrimental effect v Strength D. the property of a metal to resist cutting, penetration and abbrasion v Elasticity E. the weight of a unit volume of a material F. the property of a metal to become liquid by the application of heat v Malleability the property of metal which enables a material to return to its original state when the force G. applied is removed v Fusibility v Density H. the property of a metal to conduct electricity or heat Click Save and Submit to save and submit. Click Save All Answers to save all answers. Beno

" MAGNETS AND MAGNETIC CIRCUIT " Please Refer To the Answer Key. Please indicate solution so that I could understand If I'm wrong with my solutions.  THANKYOU!

pls help