
Earth’s magnetic strength is __________ near the geographical poles.
(A) Strongest
(B) Weakest
(C) Zero
(D) None of the above
Answer
125.1k+ views
Hint Magnetic lines in a magnet start from the north magnetic pole to the south magnetic pole. You can think of the earth’s pole as the pole of a magnet. Thus, the higher the flux of the magnetic field can be observed near the pole as compared to anywhere else on the planet.
Complete Step by step solution
Earth’s magnetic strength is strongest near the geographical poles. Like a magnet bar, the earth’s magnetic lines loops going from the north magnetic pole to south magnetic. The magnetic field lines are closer near the poles comparatively and it goes into space and back to the south pole of the earth. The field is comparatively weaker near the equator.
Geographically, it is accepted that the origin of the earth’s magnetic field is the electric current that flows in the molten outer core of Earth.
Thus, Option (A) is correct.
Additional Information The magnetic field can be calculated. It has been approximated correctly centuries ago. However, now we can represent the earth’s magnetic field by the following diagram:

Here, the X-axis represents the geographic north while the Y-axis represents the geographic east.
The Z-axis points towards the downward direction.
The inclination or magnetic inclination is the angle between horizontal and earth’s magnetic field. The way it is measured is that positive values suggest that the magnetic field is pointing downwards while the negative value means the magnetic field is pointing upwards. This angle varies with the position of the observer on earth.
Declination of Magnetic declination is the angle between geographic north and true (magnetic) north. Like the magnetic inclination, this angle also varies with the position of the observer.
Note Take care of the fact that the geographic North pole of the earth is the magnetic south pole. In the case of compasses, the opposites attract, and thus the north end of the compass needle points towards the magnetic south. While approaching such a question, take care of what has been asked, geographic north/south pole, or magnetic north/south pole.
Complete Step by step solution
Earth’s magnetic strength is strongest near the geographical poles. Like a magnet bar, the earth’s magnetic lines loops going from the north magnetic pole to south magnetic. The magnetic field lines are closer near the poles comparatively and it goes into space and back to the south pole of the earth. The field is comparatively weaker near the equator.
Geographically, it is accepted that the origin of the earth’s magnetic field is the electric current that flows in the molten outer core of Earth.
Thus, Option (A) is correct.
Additional Information The magnetic field can be calculated. It has been approximated correctly centuries ago. However, now we can represent the earth’s magnetic field by the following diagram:

Here, the X-axis represents the geographic north while the Y-axis represents the geographic east.
The Z-axis points towards the downward direction.
The inclination or magnetic inclination is the angle between horizontal and earth’s magnetic field. The way it is measured is that positive values suggest that the magnetic field is pointing downwards while the negative value means the magnetic field is pointing upwards. This angle varies with the position of the observer on earth.
Declination of Magnetic declination is the angle between geographic north and true (magnetic) north. Like the magnetic inclination, this angle also varies with the position of the observer.
Note Take care of the fact that the geographic North pole of the earth is the magnetic south pole. In the case of compasses, the opposites attract, and thus the north end of the compass needle points towards the magnetic south. While approaching such a question, take care of what has been asked, geographic north/south pole, or magnetic north/south pole.
Recently Updated Pages
JEE Main 2021 July 20 Shift 2 Question Paper with Answer Key

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Main 2023 (April 8th Shift 2) Physics Question Paper with Answer Key

JEE Main 2023 (January 30th Shift 2) Maths Question Paper with Answer Key

JEE Main 2022 (July 25th Shift 2) Physics Question Paper with Answer Key

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility & More

JEE Main Exam Marking Scheme: Detailed Breakdown of Marks and Negative Marking

The formula of the kinetic mass of a photon is Where class 12 physics JEE_Main

JEE Main 2023 January 24 Shift 2 Question Paper with Answer Keys & Solutions

Learn About Angle Of Deviation In Prism: JEE Main Physics 2025

JEE Main 2025: Conversion of Galvanometer Into Ammeter And Voltmeter in Physics

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

JEE Main Login 2045: Step-by-Step Instructions and Details

Dual Nature of Radiation and Matter Class 12 Notes: CBSE Physics Chapter 11

Electric field due to uniformly charged sphere class 12 physics JEE_Main

Ideal and Non-Ideal Solutions Raoult's Law - JEE

JEE Mains 2025 Correction Window Date (Out) – Check Procedure and Fees Here!
