Question

give me answer army
7th std science​

Answer 1

Answer:

Magnetic compass needle always points towards the magnetic north pole of the earth. When compass is at the earth's geographical north pole ,it points towards the north pole.

Magnetic force is a scalar quantity.

Metal detectors are also used to detect foreign bodies in food, as well as steel reinforcement bars in concrete and pipes, as well as wires buried in walls or floors in the building industry.

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Answer 2

Answer:

1. Thus, in a compass, a magnetic needle is used to show the geographic north direction by aligning itself in the direction magnetic South-Pole of the Earth.

2. Magnetic force is a vector quantity. - Magnetic force is the force of attraction/repulsion that arises between electrically charged particles because of their motion.

3. Metal detectors are also used to detect foreign bodies in food, as well as steel reinforcement bars in concrete and pipes, as well as wires buried in walls or floors in the building industry.

Explanation:

hope it helps you.