Electrical Engineering : Magnetism And Electromagnetism QUESTIONS AND ANSWERS :: part4 : 1 to 5
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.Core of an electromagnet should have |
| low coercivity |
| high susceptibility |
| both of the above |
| none of the above |
2.The attraction capacity of electromagnet will increase if the |
| core length increases i |
| core area increases |
| flux density decreases |
| flux density increases |
3.Which of the following statements is correct ? |
| The conductivity of ferrites is better than ferromagnetic materials |
| The conductivity of ferromagnetic materials is better than ferrites |
| The conductivity of ferrites is very high |
| The conductivity of ferrites is same as that of ferromagnetic materials |
4.Main causes of noisy solenoid are |
| strong tendency of fan out of lami-nations at the end caused by repul�sion among magnetic lines of force |
| uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts |
| both of above |
| none of the above |
5.Temporary magnets are used in |
| loud-speakers |
| generators |
| motors |
| all of the above |
More Magnetism And Electromagnetism QUESTIONS AND ANSWERS available in next pages
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