Physics
Grade-10
Easy
Question
The shape of the Earth's magnetic field resembles that of an imaginary
- U-shaped magnet
- Straight conductor carrying current
- Current-carrying circular coil
- Bar magnet
Hint:
The shape of the Earth's magnetic field resembles that of an imaginary bar magnet.
The correct answer is: Bar magnet
- Even in the absence of any other magnets, a freely suspended magnet always faces north and south. This argues that the Earth itself functions as a magnet, causing a freely suspended magnet to always point in one of two directions: north or south.
- The magnetic field of the Earth is shaped like a bar magnet with a length of one-fifth of the diameter of the Earth buried in its center. Because it draws the North Pole of the hung magnet and vice versa, the South Pole of the Earth's magnet is in the geographical North.
- As a result, a magnetic N-pole is located close to the geographical South and a magnetic S-pole is located close to the geographical North.
- On the globe, the locations of the Earth's magnetic poles are not clearly defined; rather, they are dispersed. The geographic axis and the Earth's magnets do not align.
- The geographical axis and the axis of the Earth's magnetic field are tilted at an angle of around 15 degrees.
- As a result, a freely suspended magnet makes an about 15-degree angle with the geographic axis and only roughly points north and south at a location.
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