Question

When the North Pole of a bar magnet picks up an iron nail which of the following are induced in the nail?
A. North poles
B. South poles
C. A north pole and south pole
D. None of these

Answer 1

Hint: We will use the property of a magnet to solve this question. A magnet is an object that tends to attract some metals such as iron, cobalt, and nickel when they are brought close to the magnet that means the magnetic field of the magnet.

Complete answer:
A magnet is available in many shapes and sizes. They can be in the form of a bar, horseshoe, and needle and oval. A bar magnet consists of two poles named the North Pole and the South Pole. The property of a magnet to attract other magnets and objects results due to its magnetic field whose direction in a bar magnet is from north to south.
In magnets, there is an attraction between the north-south pole while the same type of poles always repel each other such as north-north and south-south poles. But if non-magnetized objects are brought close to the magnets they are attracted by the magnet irrespective of their poles. When an object such as iron nails is brought close to the magnet and when it enters the field of the magnet, the magnet tends to develop the magnetism in the iron nails which results in the attraction and hence it sticks with the magnet.
If an iron nail is attracted towards a north pole of the magnet and sticks to it. The magnetic field lines start flowing through the iron nail. Hence the side which gets stuck to the North Pole acts as the South Pole and the opposite side acts as the North Pole.
Therefore, the option (C) is the correct answer.

Note: Magnets based on their strength are categorized into two known as a strong magnet and a weak magnet. The strong magnets consist of very high dense and strong magnet fields than the weak magnet. An example of a strong magnet is a neodymium magnet.