High School Physics
A coil of many circular turns of insulated copper wire wrapped closely in the shape of a cylinder is called a solenoid. The pattern of the magnetic field lines due to a Current in a Solenoid around that solenoid is shown in Fig. 1. If we compare the pattern of the field with the magnetic […]
Problem statement: Calculate the magnetic field at the center of a square loop of side 10 cm carrying a current of 5A. Solution: Given: Square loop’s side: a= 10 cm = 0.1 mcurrent I = 5 AThe magnetic field at the center of this square: B =? The formula of the magnetic field B at the center […]
Problem Statement: Find the magnetic field at a distance of 20 cm from a long, straight wire carrying a current of 10A. Solution: Given: current I =10 Adistance r = 20 cm = 0.2 mMagnetic field B =?We know, μ0=4π x 10-7 The magnetic field at a distance r from a long, straight wire carrying […]
Problem statement: Calculate the magnetic field at point P located on the axis at a distance of 10 cm from the center of a circular wire of radius 5 cm carrying a current of 5 A. Solution: Given: radius of circular wire: a = 5 cm = 0.05 mcurrent I = 5 AOn the axis, […]
Physics Numerical Problems Based on Biot Savart Law – The Biot-Savart law is a fundamental relationship in magnetostatics. It describes the magnetic field generated by a steady current. In this post, we will look at a set of numerical problems based on the Biot-Savart law and their step-by-step solutions. Formulas Used The Biot-Savart law allows […]
Find the magnetic field B at the center of square loop of side a carrying a current I
This post covers Ampere’s Circuital Law (class 12) with its statement and formula & derivation.
In this post, we will discuss Permeability & Relative Permeability with their definition, relationship, equations, formula, the permeability of air, examples, etc. Permeability The ability of a material to conduct magnetic lines of force through it is called the permeability of that material. It is generally represented by μ (mu, a Greek letter). The greater […]
An effect caused by the Earth’s magnetic field is the spectacular Northern and Southern Lights, which are also called the Aurora Borealis (Figure 1) and the Aurora Australis respectively (Figure 2). When charged particles from the solar wind reach the Earth’s magnetosphere, they spiral along the magnetic field lines towards the North and South poles. […]
The Earth’s magnetic field is very important for humans and other animals on Earth because it protects us from being bombarded (struck) by high-energy charged particles, which are emitted by the Sun. The stream of charged particles (mainly positively charged protons and negatively charged electrons) coming from the Sun is called the solar wind. When […]
An electric current can cause a magnetic field. The field patterns due to different currents can be seen in the diagrams below. The field pattern of a straight wire carrying current The direction of the field lines can be remembered with the right-hand grip rule. If the thumb of the right hand is arranged to […]
A table of the comparisons between the electric field and the magnetic field is shown below. Electric Field Magnetic Field An electric field is caused by charges. But, a magnetic field is caused by magnets (or electric currents). The electric field affects charges. But, the magnetic field affects magnets (or electric currents). There are 2 […]
In this post, we will discuss how the North pole and the South pole of a magnet attract the paper clips equally. When the magnet is brought close to the paper clip, the paper clip becomes a temporary magnet. The paper clip pole nearest the permanent magnet becomes an opposite pole; if the permanent magnet […]
We can make a magnet that we can switch on and off, using a coil of wire and a battery. It is called an electromagnet. Remember that, a bar magnet is not an electromagnet, rather it’s a permanent magnet. You cannot switch it off without demagnetizing it completely. In this post, we will discuss different […]
In this post, we explore electromagnetic induction – the creation of an electric current from a changing magnetic field. Whether the primary source of energy is burning coal, falling water, nuclear fission, or the Sun, virtually all of the electricity generated in the world’s power stations is the result of electromagnetic induction. In fact, electromagnetic […]
In this post we will discuss in detail about the transformer equation and transformer efficiency. We will also solve a few numerical problems using the transformer and efficiency equations. The Transformer equation The secondary potential difference of a transformer depends on the primary potential difference and the number of turns on each coil. You can […]
In this post, we will discuss the fundamentals of magnetism. Also, a number of related terminologies like magnetism, magnetic fields, ferromagnetism, paramagnetism, diamagnetism, permanent magnet, poles of magnets, magnetic attraction & repulsion, drawing field lines, a bar magnet, retentivity, compass, earth as a magnet, etc. , will be addressed. Define Magnetism Magnetism is an interaction […]
This post defines the magnetic field and magnetic field lines. This also enlists the properties of magnetic field lines. What is Magnetic field? | Define magnetic field The space or area around a magnet in which its magnetic force can be felt is called a magnetic field. The magnetic field is a vector quantity i.e. it […]
This Magnetism Notes [PDF] is primarily for the grade 10 (10th grade) physics syllabus of different international boards. This also covers the class 10 physics syllabus on Magnetism for boards like ICSE, CBSE, etc. This physics class note covers the theoretical as well as the numerical part of this important chapter. We hope, the students […]
