Lab 9 Worksheet

.________ 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

In this Exercise 6 we will explore laws critical to the study of electromagnetism. We will be using Simulation 3 (below) to explore how a moving magnet produces current in a nearby coil of wire.   a. Magnetic field strength decreases as you get farther from the poles of the magnet. Does the flux through the face of the coil change as you move the magnet? Explain your answer. b. Why does the meter needle deflect? Is the deflection in accordance with Lenz’s Law? Justify your answer in terms of Lenz’s law and your above answers.

A bar magnet is divided in two pieces. Which of the following statements is true? a. The bar magnet is demagnetized. b. The magnetic field of each separated piece becomes stronger. c. The magnetic poles are separated. d. Two new bar magnets are created.

Magnets are the main component in: Select one: capacitors. motors. permanent magnets. ohmmeters.

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.

Subject: Electric machines Please I need correct answer

" 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!

please explain step by step and show work   Please answer all subpart either dislike is ready please all subpart in clean handwriting please ASAP

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

Unlike the field of a permanent magnet, the field of an electromagnet: Select one: a. only exists in a coil. b. cannot induce voltage in a conductor. c. has no poles. d. exists only as long as current flows.