NCERT Solutions for Class 12 Physics Chapter 5 Magnetism And Matter


All matter exhibits magnetic properties when placed in an external magnetic field. Even substances like copper and aluminium that are not generally thought of as having magnetic properties are affected by the presence of a magnetic field such as that produced by either pole of a bar magnet. We will find out the magnitude of the magnetic moment of a magnet with a certain degree of the uniform magnetic field and what will happen if the magnet is rotated freely in a plane and what will be the potential energy of the magnet. We will see here, how much torque is required for turning a magnet so that its magnetic moment is at a specific alignment with the field. We will be seeing an example of a magnetic needle used to find out magnetic meridian points and computing the direction and magnitude of the earth’s magnetic field.