Lenz’s law is more or less based on Faraday’s law of guidance. Faraday’s law states that electric current in a conductor is induced by magnetic fields that are constantly changing. Lenz’s law indicates the direction of this induced current. This opposes a change in the magnetic field that created it. The change is indicated by […]
An Overview of Lenz’s Law Read More »
Class 12, Magnetic Effects of Current, Magnetic field due to a current loop, solenoid, NEET, PhysicsThe relation between the electric current passing from the loop and the integrated magnetic field of a closed loop is defined by the Ampere Circuital Law. The Law defines the proportionality between the magnetic field developed in space around an electric current and the electric current at the point of source. The law states that
Ampere’s Law and its Applications Read More »
Class 12, Magnetic Effects of Current, Magnetic field due to a current loop, solenoid, NEET, PhysicsThe magnetic field of a current-carrying conductor can be simply given by the current flowing through the conductor μₒ times. The stationary charge produces the magnetic field proportional to the magnitude of the charge but the moving charge produces a magnetic field proportional to the current. The main drawback to Ampere’s Law is that differential
Introduction Maxwell discovered a discrepancy in Ampere’s law and proposed the need for displacement current to correct it. This displacement current is caused by a changing electric field and is generated by and acts as a magnetic field source in the same manner that conduction current does. Displacement Current The displacement current is the rate
AC Generator And Transformer Read More »
Class 12, Magnetic Effects of Current, Magnetic field due to a current loop, solenoid, NEET, PhysicsA galvanometer is a device used in the electric field to detect the slightest amount of current in an electric field. It has a magnetic needle or a coil in its setup. The movement of this magnetic needle or coil shows current intensity. A galvanometer is a sensitive device. Using a galvanometer, current can be
What is the Function of a Galvanometer in a Current Circuit? Read More »
Biot-Savart law, Ampere’s law, Class 12, Magnetic Effects of Current, NEET, PhysicsA galvanometer is a device used in the electric field to detect the slightest amount of current in an electric field. It has a magnetic needle or a coil in its setup. The movement of this magnetic needle or coil shows current intensity. A galvanometer is a sensitive device. Using a galvanometer, current can be
What Happens When An Electric Dipole Is Placed In A Uniform Electric Field? Read More »
Biot-Savart law, Ampere’s law, Class 12, Magnetic Effects of Current, NEET, PhysicsThe phenomena of electricity and magnetism were important subjects of research by physicists in the nineteenth century. Both phenomena exhibited an inverse square law dependence of force and distance. Both phenomena exhibited poles. Some physicists suspected a relation between electricity and magnetism. It was not until 1820 that Hans Christian Oersted experimentally and conclusively proved
The Significance of the Oersted Experiment Read More »
Biot-Savart law, Ampere’s law, Class 12, Magnetic Effects of Current, NEET, PhysicsAccording to the superposition theorem, the response across each element in a linear, active, bilateral network with more than one source is the sum of the responses obtained from each source evaluated independently, and all other sources are replaced by their internal resistance. When two or more sources are present and connected, the superposition theorem
Superposition Theorem Read More »
Biot-Savart law, Ampere’s law, Class 12, Magnetic Effects of Current, NEET, PhysicsThe galvanometer is a device used to measure the electric current’s presence and determine small current’s magnitude. This instrument detects the small electric current by showing deflection in the needle present inside the galvanometer. It is used in bridges and potentiometers where it indicates zero electric currents. When does the galvanometer show a deflection? Besides
Sensitivity Factors of a Galvanometer Read More »
Biot-Savart law, Ampere’s law, Class 12, Magnetic Effects of Current, NEET, PhysicsThe law of conservation of energy and Lenz’s law are closely related to each other. The conservation of energy involves the application of Lenz’s law. It states that energy cannot be created or destroyed, but it can be converted into another form. According to Lenz’s law, the direction of the current opposes the magnetic flux’s
How Lenz’s Law Relates to the Conservation of Energy Read More »
Biot-Savart law, Ampere’s law, Class 12, Magnetic Effects of Current, NEET, Physics