i need number 1 and 2. please show work . thank you Which of the following is (a

Question

i need number 1 and 2. please show work . thank you

Which of the following is (are) correct? A. Like poles of different magnets repel each other. B Unlike poles of different magnets attract each other. C. For one orientation of a bar magnet, in the plane of this paper, there are four neutral points. (a) AB (b) None of the above (c) ABC (d)C (e) BC. A magnet 20 cm long is aligned so that the nearest neutral point is found, along the longitudinal axis of the magnet, 30 cm from the south pole of the magnet. If the horizontal component of the Earth's magnetic field is 2.5 times 10^-5 Wb/m^2, then what is the strength of each magnetic pole, in Wb? (a) 1.85 times 10^-6 (b) 4.2 times 10^-6 (c) 3.5 times 10^-6 (d) 2.5 times 10^-6 (e) 2.95 times 10^-6 A neutral point is located on the perpendicular bisector to a magnet 40 cm from each pole. The magnet is 20 cm long. The Earth's magnetic field is 2.5 times 10^-5 Wb/m^2. What is the strength of each magnetic pole, in Wb? (a) 3.3 times 10^-5 (b) 1.6 times 10^-5 (c) 1.2 times 10^-5 (d) 4 times 10^-6 (e) 8 times 10^-6 A magnet 20 cm long with a pole strength of 1.95 times 10^-6 Wb is aligned so that neutral points are found on the perpendicular bisector to the magnet. Assuming the strength of the Earth's field to be 2.5 times 10^-5 Wb/m^2, determine the shortest distance, in meters, from a neutral point to the north pole of the magnet. (a) 0.62 (b) 0.25 (c) 0.18 (d) 0.34 (e) 0.50.

Explanation / Answer

We know the basics of magnetism always expresses that like poles repel and unlike poles attract. So if we take like poles of different magnets, then they repel each other and same is true for unlike poles i.e. if we bring unlike poles of different magnets, then they attract each other. Neutral Points are the points where there is no net magnetic field that means if we keep a compass needle at that point, it will show no deflection or does not point in a particular direction. This is possible if the magnetic field of a bar magnet is equal and opposite to that of earth's magnetic field. The below fig. shows the orientation of magnetic field lines around a bar magnet.

Here X marks the neutral points and we can see there are only two neutral points.

so only A & B are correct. option a is correct

ALL THE BEST IN THE COURSE WORK.

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