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Q1. Calculate the force between two flat circular coils each containing 10 turns of wire and carrying 5 A of current in the same direction of circulation, have mean radii of 0.2 m and are placed coaxially 0.01 m apart.
undefined Q2. A piece of ferromagnetic material with constant relative permeability 5000 is placed in a uniform magnetic field. The material is in the shape of a spheroid and is placed with its longest axis parallel to the field. What is the ratio of the flux density B inside the body to the original flux density outside the body when the axial ratio of the spheroid is:
1:1 (a sphere), 5:1 (a prolate spheroid) Q 3. Describe how the translational force on a magnetic material is related to the magnetic field and the properties of the material. The mass of a sample of paramagnetic material is being determined using a conventional force balance (i.e., by measuring its weight). However, in this case there is a magnetic field of strength 106 A.m-1 with a vertical field gradient of 2·107 A.m-2 present. If the susceptibility of the material is 4·10-4 calculate the force on the sample and hence the error in the measured mass. Q 4. Iron has a magnetic moment of 2.22 Bohr magnetons per atom and a density of 7.87·103 kg.m-3. Calculate the expected magnetization of iron at 0 K and describe any assumptions that you have made. How would you expect this magnetization of iron to vary as temperature is increased. How does the number of Bohr magnetons per atom change from 0 K to 300 K. Why does a piece of iron typically not exhibit high magnetization at room temperature (unless it has been âmagnetizedâ)?
Sample Solution
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organizational structure, systems and culture among others. Changes are the inevitable twists that affect the normal and known paths through which an organization operates. Some of the aforementioned twists arise internally from the organizationâs need to achieve new status. Others are externally experienced due to the shifts in the business environment. The issues aforementioned under the discussion are achieved through the functions of the HRM office. Functions of HRM Generally, HRM management can be subdivided into three interlinked phases. The practice functions include recruiting qualified human resources, managing the employees in the working environment as well as preparing and enforcing exit of the employees from the organization. The process of recruiting employees arises from the organizationâs need to properly position itself in the economy. Ideally, recruitment should follow an order closest to; vacancy advertisement, selection of potential candidates, interviewing and contracting the successful candidate(s). Once in the organization, new employees are inducted and trained. It is during work performance that issues such as motivation, compensation development, disciplinary actions, performance appraisals, career planning / development, counseling, talent management, safety management and staff communication are conducted (Gold & Bratton, 2001). The employees continuously offer their service to the organization under the existing HRM measures until they exit. Exit may result from retrenchment, obsolescence, retiring, resignation or termination of employment. The HRM at this phase has a responsibility to counsel and prepare the exiting employee for the challenges and opportunities awaiting the employee in the future. The office should ethically hand over all the legal documents and benefits to the exiting employee for positive development of the organizationâs goodwill/reputation in th>
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