The five questions in this problem are independent. Which can be considered a ma

Question

The five questions in this problem are independent. Which can be considered a magnetic dipole? Circle all that are true. an sheet of current a long straight wire carrying current an ideal solenoid an ideal toroid a small current loop a bar magnet Which statements are not true of ferromagnetic materials? Circle all that apply. Domains have permanent magnetic moments which align with external magnetic fields. The relative permeability is large and negative. The large mu_r is usually non-linear. Some magnetization is retained when the external H-field is removed. Ferromagnetic materials are used to make most familiar magnets. Common ferromagnetic materials include Ni, Co, Si and Fe. The x-y plane is the boundary between air above (mu_1 = mu_0 for z > 0) and a magnetic material below (mu_2 = 2000 mu_0 for z

Explanation / Answer

8.a) From the following options given ii) a long straight wire carrying current

iii) an ideal solonoid

iv) an ideal toroid

v) a bar magnet were considered a magnetic dipole.

These were considered as a magnetic dipole because they all produces a magnetic field around them when any force of attraction or repulsion is present around it.

8. b) The statements i) and iv) are not true of ferromagnetic materials (From the properties of ferromagnetic materials).

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