NCERT

The angle between the magnetic north (the direction a compass points) and the geographic north (true north) is the magnetic declination. This angle can change over time due to changes in the Earth's magnetic field and varies with location on Earth. It is important for navigation where accurate direc

The Earth's magnetic field makes a magnetic inclination or dip with the horizontal plane at a particular location. It shows how much the magnetic field is tilted from the horizontal. It gets tilted due to the Earth's magnetic nature. The formula is:
tan I = B_V / B_H,
where B_V is the vertical compon

In a magnetic dipole, two equal and opposite magnetic poles are kept at a small distance. In concept, it is equal to an electric dipole. The magnetic dipole moment (M) represents the strength and orientation of the magnetic dipole and it is a vector quantity. The formula is: M = m * 2l. Here m repre

The region around a moving electric charge or a magnetic material where the force of magnetism acts is called the magnetic field. The magnetic field lines are used to represent the strength and direction of the magnetic field and these are imaginary lines. The density of these lines shows the field

Absolutely, if thoroughly practiced and understood, these solutions are more than enough to help one score full marks in this chapter. It comprises all key concepts such as laws, derivations, and applications and covers all questions from the NCERT textbook. The step-by-step solutions help students

The NCERT solutions offer all the theoretical and numerical textbook problems through a structured and simplified explanation, hence it is highly beneficial to prepare from here. Chapter 4 contains complex vector-based concepts like the motion of charged particles, magnetic force, and Biot–Savart la

The principle that a current-carrying coil placed in a magnetic field feels a torque is behind a moving coil galvanometer. The coil rotates due to this torque, and the angle of deflection is proportional to the current. For the conversion of a galvanometer into an ammeter, a high current is allowed

This force is exerted by the magnetic fields produced by the parallel current-carrying conductors. If the currents run in the opposite directions, they repel and if they run in the same direction, then they attract. The force is exerted because each conductor lies in the magnetic field produced by t

When electric current passes through a long coil of wire, it generates a nearly uniform magnetic field inside it, it is the solenoid. Outside this solenoid, the magnetic field is weak and negligible. On the other hand, in a toroid, the magnetic field is completely confined within its core, which for