Force Between Two Parallel Current Carrying Conductors || Class 12 Physics Notes
It is an experimentally established fact that two current-carrying conductors attract each other when the current is in the same direction and repel each other when the currents are in opposite direction. Here we will study about Force Between Two Parallel Current Carrying Conductors as wire: Force Between Parallel Current-Carrying Wires Consider two long wires $W_{1}$ and $W_{2}$ kept parallel to each other and carrying currents $I_{1}$ and $\mathrm{I}_{2}$ respectively in the same direction. T...
Read More →Force on a Moving Charge in a Magnetic Field | Class 12 Physics Notes
Force on a Charged Particle in a Magnetic Field Difference in Force on a Charged Particle by Magnetic Field and Electric Field When a charged particle travels through a magnetic field, it experiences a force unlike any other that we're familiar with in everyday life. To illustrate the point, envision yourself walking down the sidewalk, when all of a sudden, a strong gust of wind hits you from the side. Now imagine that instead of moving sideways, you shoot straight up to the sky. Here we will st...
Read More →Motion of Charged Particle in Electric and Magnetic Field | Moving Charges and Magnetism Class 12, JEE & NEET
The motion of a charged particles in an electric and magnetic field (in the simultaneous presence of both ) has a variety of manifestations ranging from straight-line motion to the cycloid and other complex motion. Both electric and magnetic fields impart acceleration to the charged particle. But, there is a qualification for the magnetic field as acceleration due to magnetic field relates only to the change of direction of motion. The magnetic force being always normal to the velocity of the pa...
Read More →Motion of Charged Particle in a Magnetic Field | Moving Charges and Magnetism Class 12, JEE & NEET
When a charged particle moves along a magnetic field line into a region where the field becomes stronger, the particle experiences a force that reduces the component of velocity parallel to the field. This force slows the motion along the field line and here reverses it, forming a Magnetic Mirror. The motion of a charged particle in a magnetic field is characterized by the change in the direction of motion. It is expected also as the magnetic field is capable of only changing the direction of mo...
Read More →Torque on a Current loop in a Magnetic Field || Moving Charges and Magnetism - Class 12, JEE & NEET
Without torque, there would be no twists and turns, no spins! Wouldnโt life be boring that way? Torque gives a rotational motion to an object that would otherwise not be possible. So here we will study about Torque and Torque on a Current loop in a Magnetic Field in detailed derivation. Torque Experienced by a Current Loop in a Uniform Magnetic Field Let us consider a rectangular current loop PQRS of sides a and b suspended vertically in a uniform magnetic field. $\overrightarrow{\mathrm{B}}$. L...
Read More →Flemings Left Hand Rule Class 12 Physics - eSaral
Flemings Left Hand Rule Class 12 states that if we stretch the thumb, the forefinger, and the middle finger of our left hand such that they are mutually perpendicular to each other. If the forefinger gives the direction of current and the middle finger points in the direction of the magnetic field then the thumb points towards the direction of the force or motion of the conductor. Then if the forefinger points in the direction of field $(\overrightarrow{\mathrm{B}})$, the central finger in the d...
Read More →Force on a Current-Carrying Conductor in Magnetic field - Class 12, JEE & NEET
Force on a Current-Carrying Conductor in Magnetic field A current-carrying conductor produces a magnetic field around it. i.e. Behaves like a magnet and exerts a force when a magnet is placed in its magnetic field. Similarly a magnet also exerts equal and opposite force on the current-carrying conductor. The direction of this force can be determined using Flemings left-hand rule. Current Element Current element is defined as a vector having a magnitude equal to the product of current with a smal...
Read More →Solenoid and Toroid | Difference between Solenoid and Toroid
A toroid works as an inductor, which boosts the frequency to appropriate levels. Inductors are electronic components that are passive so that they can store energy in the form of magnetic fields. A toroid turns, and with those turns induces a higher frequency. Toroids are more economical and efficient than solenoids. So here we will study in detail about solenoids and Toroids and the differences between both. Solenoid Toroids Difference between Solenoid and Toroid Similarities Between Solenoid a...
Read More →Magnetic Field of a Solenoid || Class 12 Physics Notes
eSaral Class 12 Magnetic Field of a Solenoid ๐ Checkout eSaral Courses Magnetic Field of a Solenoid A solenoid is a long cylindrical helix. It is made by winding closely a large number of turns of insulated copper wire over a tube of cardboard or china-clay. When an electric current is passed through the solenoid, a magnetic field is produced around and within the solenoid. The figure shows the lines of force of the magnetic field due to a solenoid. The lines of force inside the solenoid are nea...
Read More →Ampere's Circuital Law and it Applications || Magnetic Effects of Current Class 12
eSaral Class 12 Physics Notes Applications of Ampere's Law in Physics Do you know about Ampere's Circuital Law? Well, it is a current distribution that helps us to calculate the magnetic field, and yes, Biot-Savart's law does the same, but Amperes law uses the case of high symmetry. We will first understand Amperes circuital law, its definition, formulae, Applications of Ampere's Law in detail. What is Amperes Circuital Law? Application of Ampere's Circuital Law Magnetic induction due to a long ...
Read More →Magnetic Field at the Centre of a Circular Coil | Circular Current loop as a Magnetic Dipole
Home Physics Magnetic Field at the Centre of a Circular Coil Here we will study about the Magnetic Field at the Centre of a Circular Coil. Here we will study about the number of cases Magnetic Field at the Centre of a Circular Coil Magnetic dipole moment of the current loop ๐ Checkout eSaral Courses Magnetic Field at the Center of a Circular Current-Carrying Coil Consider a circular coil of radius r through which current I is flowing. Let AB be an infinitesimally small element of length d\ell. A...
Read More →Helmholtz Coils | Magnetic Field between two Coils | eSaral
Helmholtz coil is named after the German physicist Hermann von Helmholtz. It is comprised of two identical magnetic coils positioned in parallel to each other, and their centers are aligned in the same x-axis. The two coils are separated by a distance equal to the radius like a mirror image as shown in Figure 1. When current is passing through the two coils in the same direction, it generates a uniform magnetic field in a three-dimension region of space within the coils. Helmholtz coils are norm...
Read More →Right Hand Palm Rule - Magnetic Effect of Current Class12, JEE & NEET
So far we have described the magnitude of the magnetic force on a moving electric charge, but not the direction. The magnetic field is a vector field, thus the force applied will be oriented in a particular direction. There is a clever way to determine this direction using nothing more than your right hand. The direction of the magnetic force $F$ is perpendicular to the plane formed by $v$ and $B$, as determined by the right-hand palm rule, which is illustrated in the figure. The right-hand rule...
Read More →Mind Map of Vectors (Part 2) Physics Class 11, JEE & NEET-Download from here
Learn all the formulas and important topics of Vectors through this mind map. Download Mind Map...
Read More →Magnetic Field due to Infinite Straight Conductor | Magnetic Effects of Current Class 12
Home Magnetic Effects of Current Magnetic Field due to Infinite Straight Conductor Magnetic field due to a long straight conductor Here we will discuss all the cases involved in the magnetic field due to Conductor such as Magnetic Field due to Infinite Straight Conductor, and many more discussed below: Consider a long straight conductor XY through which current I is flowing from $X$ to Y. Let $P$ be the observation point at a distance 'r' 'from the conductor XY. Let us consider an infinitesimall...
Read More →Right hand Thumb Rule in Physics Class 12 | Magnetic Effects of Current
The right-hand thumb rule in Physics states that: to determine the direction of the magnetic force on a positive moving charge,ฦ, point the thumb of the right hand in the direction of v, the fingers in the direction of B, and a perpendicular to the palm points in the direction of F. Right-Hand Thumb Rule: If we grasp the conductor in the palm of the right hand so that the thumb points in the direction of the flow of current, then the direction in which the fingers curl, gives the direction of ma...
Read More →Magnetic Effect of Electric Current Class 12 Notes | Introduction
The electricity and magnetism are linked to each other and it is proved when the electric current passes through the copper wire, it produces a magnetic effect. The electromagnetic effects first time noticed by Hans Christian Oersted. Oersted discovered a magnetic field around a conductor carrying an electric current. The magnetic field is a quantity, which has both magnitude and direction. The direction of a magnetic field is usually taken to be the direction in which, a north pole of the compa...
Read More →Rotational Motion Revision Video - Class XI, JEE, NEET
The Revision series is designed for all JEE NEET aspirants to provide quick revision of all the chapters of Class 11th 12th with important key concepts. The revision videos help you make the best use of your limited time left for revision. It is especially time-saving for all students who are going to appear for 12th Board. When you donโt have time to go through chapter notes in detail, learn and revise most important key concepts and formulae here. PART 1 Saransh Sir will be covering the follow...
Read More →Mind Maps for Rotational Motion: Angular Momentum Revision - Class XI, JEE, NEET
Rotational Motion Class 11 comprises variety of cases with important formulae and key points. So here is the mind map to help you in remembering all the key formulae and important concepts on finger tips. Download...
Read More →Ammeter and Voltmeter Circuit Diagram | Current Electricity Class 12, JEE & NEET
Home Current Electricity Class 12 Ammeter and Voltmeter Circuit Diagram Voltmeters and ammeters are used to measure voltage and current, respectively. Here, we will discuss both the Ammeter and Voltmeter Circuit Diagram. ๐ Checkout eSaral Courses India's Best Exam Preparation for Class 12th - Download Now Ammeter Voltmeter In current electricity, two instruments appear in almost every circuit diagram the ammeter and the voltmeter. Understanding how they work, how they are constructed from a galv...
Read More →Post Office Box Physics || Current Electricity Class 12, JEE & NEET
eSaral Class 12 Post Office Box Physics ๐ Checkout eSaral Courses A Post Office Box can also be used to measure an unknown resistance. It is a Wheatstone Bridge with three arms P, Q and R; while the fourth arm(s) is the unknown resistance. P and Q are known as the ratio arms while R is known as the rheostat arm. Post Office Box, Physics named it so because it has a shape of box and was designed to find resistance of electric cables and telegraph wires. It was used in post offices to determine re...
Read More →Moving Coil Galvanometer Class 12
Ever wondered how the utility company detects how much power is used each month? The galvanometer is an instrument used to determine the presence, direction, and strength of an electric current in a conductor. Here we will study about the Galvanometer, moving Coil Galvanometer class 12 and its types. These are instruments used for detection and measurement of small currents. Moving Coil Galvanometer Types of Moving Coil Galvanometer Current Sensitivity of a Galvanometer Voltage Sensitivity of a ...
Read More →Wheatstone Meter Bridge - Circuit Diagram || Current Electricity Class 12, JEE NEET
A Meter Bridge also called a slide wire bridge is an instrument that works on the principle of a Wheatstone bridge. A Wheatstone meter bridge is used in finding the unknown resistance of a conductor as that of in a Wheatstone bridge. The wire is made of manganin because they have low temperature coefficient and large resistivity. The wires are soldered to two thick L shaped copper strips with binding terminals. Between these there is a third copper strip. There are two fixed gaps ab and cd. (1) ...
Read More →Wheatstone Bridge Circuit Diagram, Applications, Formula - Class 12, JEE & NEET
Wheatstone Bridge Principle of Wheatstone Bridge Balanced Wheatstone Bridge Unbalanced Wheatstone Bridge Applications of Wheatstone Bridge Kelvin's Double Bridge The Wheatstone Bridge circuit is nothing more than two simple series-parallel arrangements of resistances connected between a voltage supply terminal and ground producing zero voltage difference between the two parallel branches when balanced. Here we will study about, Wheatstone Bridge, the Conditions of balanced and Unbalanced Wheatst...
Read More →Kelvin Bridge - Definition and Diagram || Current Electricity Class 12, JEE & NEET
The Kelvin bridge or Thompson bridge is used for measuring the unknown resistances having a value less than 1ฮฉ. It is the modified form of the Wheatstone Bridge. Here we will study about Kelvin Bridge, its Diagram and the equation of Kelvin Bridge. Why there is a requirement of Kelvin Bridge? Wheatstone bridge use for measuring the resistance from a few ohms to several kilo-ohms. But error occurs in the result when it is used for measuring the low resistance. This is the reason because of which ...
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