Q5. A magnetic needle free to rotate in a vertical plane aligns itself with the vertical direction at a particular place on the Earth. What does this indicate about the location of this place? (Hint: Think about the poles)
Q6. Define the terms: (a) Magnetic Retentivity (b) Magnetic Coercivity Draw a schematic hysteresis curve for a soft iron and steel core to distinguish between them. mr bhatti 57 obb file download new
Q7. An iron bar magnet is heated to $1000^\circ \textC$ and then cooled in a magnetic field free space. Will it retain its magnetism? Give reason. Cybercriminals often rename malicious files as “game
Q8. A bar magnet of magnetic moment $6\text J/T$ is aligned at $60^\circ$ with a uniform external magnetic field of $0.44\text T$. Calculate: (a) The work done in turning the magnet to align its magnetic moment normal to the field. (b) The torque on the magnet in the final position. mr bhatti 57 obb file download new
Q9. The horizontal component of the earth’s magnetic field at a place is $0.3\text G$ and the dip angle is $60^\circ$. Calculate the value of the vertical component and the resultant magnetic field of the earth at that place.
Q10. A solenoid has a core of a material with relative permeability 4000. The windings of the solenoid are insulated from the core and carry a current of 2A. If the number of turns is 1000 per meter, calculate the magnetic intensity ($H$) and the magnetic field ($B$) inside the core.
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