Search SchoolNGR

Saturday, 15 August 2026
Register . Login

Physics Past Questions and Answers

Topic: Magnets and Magnetic Fields

Jamb Physics Questions - Magnets and Magnetic Fields

Question 1:
Which of the following statements is correct? The magnetized state of an iron bar can be destroyed completely by
  • A Heating the bar to a high temperature
  • B Breaking the bar
  • C Connecting opposite poles with a small piece of iron
  • D Placing the bar inside a strong magnetic field
  • E None of the above
View Answer & Explanation
Question 2:
The name given to the characteristics behaviour of substances which set their length perpendicular to a strong magnetic field instead of in line with it is
  • A Magnetization
  • B Paramagnetism
  • C Diamagnetism
  • D Demagnetization
  • E Ferromagnetism
View Answer & Explanation
Question 3:
A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are
  • A 0<sup style='font-size: smaller;'>o</sup> and 0<sup style='font-size: smaller;'>o</sup>
  • B 60<sup style='font-size: smaller;'>o</sup> and 60<sup style='font-size: smaller;'>o</sup>
  • C 90<sup style='font-size: smaller;'>o</sup> and 90<sup style='font-size: smaller;'>o</sup>
  • D 90<sup style='font-size: smaller;'>o</sup> and 0<sup style='font-size: smaller;'>o</sup>
  • E 0<sup style='font-size: smaller;'>o</sup> and 90<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation
Question 4:
In the Figure above, QR is a vertical conductor and the current I flows from R to Q, P is a point on the horizontal plane and is to the south of the wire. The direction of the magnetic field at P due to the current is
  • A Upward
  • B North
  • C South
  • D West
  • E East
View Answer & Explanation
Question 5:
A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?
  • A I only
  • B II only
  • C III only
  • D I and II
  • E I,II and III
View Answer & Explanation