A magnet is a material that attracts certain other types of the material towards itself. Such materials are called the magnetic material. For example, the materials like iron, nickel etc are attracted by the magnet. The force that attracts the magnetic material is called magnetic force. The magnet has two poles, north pole and south pole. Like poles repel each other and unlike poles attract each other. If we break a bar magnet into several pieces, each piece will behave like an independent magnet. We cannot separate the poles of the magnet.
Rojer takes a rod and connects its one end with the electric current. He finds the rod behaves like a magnetic and exerts attractive force on magnetic material, such as, iron and nickel. The force which is being exerted by the rod is known as_________.
(a) Magnetic force
(b) Electrostatic force
(c) Electromagnetic force
(d) Nuclear force
(e) None of these
The magnetic force that generates due to the electric current is called the electromagnetic force.
Our earth behaves like a huge bar magnetic. All the object falling from a certain height is attracted towards the centre of the earth. The magnetic behavior of the earth is solely due to the certain elements present in the core of the earth. The elements due to which earth behave like a huge bar magnetic is ___?
(a) (Ni, Fe)
(b) (Ni, Co)
(c) (Fe, Co)
(d) (Zn, Fe)
(e) None of these
The element, which is present in the core of the earth and due to which it behaves like a magnet, is Ni and Fe.
An electrically charged object exerts force on an uncharged object. Such force is called the electrostatic force. For example, if you rub a plastic comb with your hair and bring the comb near the tiny piece of the paper, the piece of paper will either stick to the comb, or will start moving due the electrostatic force. Similarly, an ebonite rod when rubbed with the woolen cloth, it acquires the negative charge and attracts the tiny piece of paper.
When a plastic comb is rubbed with hair, it acquires some charges due to which it attracts tiny pieces of paper. The types of charge, which the comb acquires form the hair is ____.
(c) α charge
(d) β charge