FreeNotes
A galvanometer is a sensitive device used to detect and measure small electric currents. It operates based on the principles of electromagnetism, particularly the interaction between an electric current and a magnetic field. Here’s how it works: Step 1: Current Creates Magnetic Field: Inside the galvanometer, there is a coil of wire placed within a … Read more
An electric bell operates using the principle of electromagnetism, which is the interaction between electric current and magnetic fields. Here’s a detailed explanation of how it works: Step 1: Electromagnet Creation: When an electric current flows through a coil of wire (also called a solenoid) within the electric bell, it generates a magnetic field around … Read more
The right-hand rule is a helpful way to determine the direction of the magnetic field surrounding a current-carrying wire. Here’s how it works: Step 1: Hold the wire with your right hand. Step 2: Position your thumb in the direction of the conventional current flow (from positive to negative, or in the direction that positive … Read more
Increasing the number of turns increases the magnetic field strength because more loops mean a greater concentration of the field. Related Questions: Can two magnetic field lines intersect each other? Justify your answer. A freely suspended magnet always points along the north-south direction. Why? What is the neutral zone or field-free region of the magnetic … Read more
Magnets help create rotational motion by interacting with current-carrying conductors, converting electrical energy into mechanical energy. Related Questions: Can two magnetic field lines intersect each other? Justify your answer. A freely suspended magnet always points along the north-south direction. Why? What is the neutral zone or field-free region of the magnetic field? Is there any … Read more
Each piece becomes a smaller magnet with both a north and south pole, meaning monopoles cannot exist. Related Questions: Can two magnetic field lines intersect each other? Justify your answer. A freely suspended magnet always points along the north-south direction. Why? What is the neutral zone or field-free region of the magnetic field? Is there … Read more
Soft iron is used because it has high magnetic permeability, can be easily magnetized, and loses its magnetism quickly when the current is switched off. Related Questions: Can two magnetic field lines intersect each other? Justify your answer. A freely suspended magnet always points along the north-south direction. Why? What is the neutral zone or … Read more
A solenoid produces a strong magnetic field because the current in each loop adds up, creating a concentrated and uniform field inside the coil. Related Questions: Can two magnetic field lines intersect each other? Justify your answer. A freely suspended magnet always points along the north-south direction. Why? What is the neutral zone or field-free … Read more
Many species of birds and other animals, such as sea turtles, salmon, and insects, are known to navigate long distances during migration. One of the key ways they do this is by using the Earth’s magnetic field as a natural compass. This ability is known as magnetoreception, and it allows animals to detect and respond … Read more
Earth’s Magnetic Field The Earth’s magnetic field, also known as the geomagnetic field, is the magnetic field that surrounds the Earth, extending from the Earth’s interior out into space. This magnetic field is essential for life on Earth, as it protects the planet from harmful solar and cosmic radiation, and it plays a crucial role … Read more