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AFCAT-EKT EE Quiz 4

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Question 1

The area of hysteresis loop obtained with a certain specimen of iron was 9.3

. The coordinates were such that 1cm =1000 AT/m and 1 cm = 0.2 Wb/

. The hysteresis loss is J/

/cycle is

Question 2

A wire $Description: Description: Description: E:\Gate\SSC-JE Electrical - Part 1\7_Magnetism-and-Electromagnetism-final_files\image121.png$ formed by joining two semicircular wires of radii $Description: Description: Description: E:\Gate\SSC-JE Electrical - Part 1\7_Magnetism-and-Electromagnetism-final_files\image122.png$ and $Description: Description: Description: E:\Gate\SSC-JE Electrical - Part 1\7_Magnetism-and-Electromagnetism-final_files\image123.png$ carries a current $Description: Description: Description: E:\Gate\SSC-JE Electrical - Part 1\7_Magnetism-and-Electromagnetism-final_files\image104.png$ as shown in below figure. The magnitude of magnetic field at the centre $Description: Description: Description: E:\Gate\SSC-JE Electrical - Part 1\7_Magnetism-and-Electromagnetism-final_files\image111.png$ is $Description: Description: Description: E:\Gate\SSC-JE Electrical - Part 1\7_Magnetism-and-Electromagnetism-final_files\image124.png$

Question 3

A galvanometer has a resistance of $Description: Description: Description: E:\Gate\SSC-JE Electrical - Part 1\7_Magnetism-and-Electromagnetism-final_files\image086.png$ ohms. It is shunted by a resistance of S ohm. How much resistance should be added in series so that the main current remains unchanged?

Question 4

A voltmeter, an ammeter and a cell are connected in series. The ammeter will

Question 5

A charge will experience a Maximum force due to magnetic field when it is

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ESE & GATE EE General

Jul 2ESE & GATE EE