In the absence of any current, a compass needle rests in which direction?

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South-North

North-South

East-West

West-East

answer is A.

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Detailed Solution

Concept- The magnetosphere, or north and south magnetic fields, is present on the earth, which is a massive magnet. Evidence poles have moved around hundreds of times before.
The earth functions as a powerful magnet.
Because the Earth is a magnet, it acts like a magnet. It is an electromagnet rather than a static magnet. Thanks to heat-induced convection, molten metal (mainly iron) flows deep beneath the Earth. Earth is a powerful magnet.
The globe may be a powerful "magnet," which is why. Because of the south end of a magnet, the Earth's North Pole may be taken into consideration, whereas the Earth's South Pole may be taken into consideration. As a result, a compass needle's north end is often directed toward the geographic North Pole.
In a north-south orientation, the magnets are at rest.
Due to the fact that every magnet has two poles—the North Pole and the South Pole—the North Pole of one magnet is drawn to the South Pole of another magnet, and vice versa. As a result, when given free rein to spin in any direction, the compass needle will always point in a north-south orientation.
As a result, when there is no electrical current, the compass needle always rests in the north-south direction of the Earth. The needle, however, sits in the direction opposite to the Earth's magnetic flux while current flows through the circuit.
Thus, the direction is South-North.
Hence, the correct option is 1.

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