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# Magnetism & Gauss's Law Video Lecture - Physics Class 12 - NEET

## Physics Class 12

154 videos|444 docs|185 tests

## FAQs on Magnetism & Gauss's Law Video Lecture - Physics Class 12 - NEET

 1. What is magnetism and how does it relate to Gauss's Law? Ans. Magnetism is a phenomenon that arises from the motion of electric charges, resulting in attractive or repulsive forces between objects. Gauss's Law for magnetism states that the net magnetic flux through a closed surface is always zero, indicating that there are no magnetic monopoles (single magnetic poles). This law helps us understand the behavior of magnetic fields and their relationship to electric currents.
 2. How is Gauss's Law applied to magnetism? Ans. Gauss's Law for magnetism is applied by considering a closed surface called an Amperian loop. The law states that the magnetic field passing through the loop is directly proportional to the net current passing through the loop's area. This allows us to calculate the magnetic field strength at a specific point by integrating the magnetic field contributions from the current-carrying conductors.
 3. What are the units of magnetic flux? Ans. The units of magnetic flux are Weber (Wb) or Tesla meter squared (T·m²). Magnetic flux represents the total magnetic field passing through a given area and is defined as the product of magnetic field strength (in Tesla) and the area (in square meters) perpendicular to the field.
 4. How does magnetism affect electric charges and currents? Ans. Magnetism affects electric charges and currents through the Lorentz force law. When an electric charge moves through a magnetic field, it experiences a force perpendicular to both the direction of its motion and the magnetic field lines. This force causes charged particles to move in curved paths, affecting the trajectory of electric currents and producing various electromagnetic phenomena.
 5. Can Gauss's Law be used to calculate the magnetic field inside a magnet or a magnetic material? Ans. No, Gauss's Law for magnetism cannot be directly applied to calculate the magnetic field inside a magnet or a magnetic material. The law is primarily used to calculate the magnetic field generated by electric currents. The behavior of magnetic fields inside magnets or magnetic materials is more complex and requires additional principles, such as magnetic domain theory and the properties of magnetic materials, to accurately describe and analyze.

## Physics Class 12

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