Chemistry Revision Series for Class 11, 12, JEE & NEET - Download Mind Maps
Revise complete Chemistry on eSaral YouTube Channel. Get everything you are looking for JEE and NEET Preparation in this Chemistry Revision Series by Prateek Gupta Sir (IIT Bombay - Metallurgy). Here you will get to know about important key concepts and all the important reactions that are very important to solve conceptual problems that will come in main Exam. Hydrocarbons - Alkane Hydrocarbons - Alkene (Part 1) Hydrocarbons - Alkene (Part 2) Aromatic Hydrocarbons...
Read More →JEE Advanced 2020 Exam Date Announced, Check Syllabus - Important Information
Joint Entrance Examination, JEE Advanced or IIT JEE Exam dates 2020 have been announced. Union HRD Minister Ramesh Pokhriyal today shared that the JEE Advanced 2020 would be conducted on August 23, 2020. The dates for JEE Main 2020 were announced on May 5 by the HRD Minister during a webinar with the students. JEE Main 2020 would be conducted from July 18 to July 23. Given the date of the JEE Advanced 2020, it can be suggested that the results of JEE Main 2020 are expected to be announced by Aug...
Read More →Class 12 Maths Timetable to Study in Gap (PART-3)
Here is an Ultimate strategy time table to study in Gaps. You can also Download PDF from the given link below: Timetable To Study Between Gaps - DOWNLOAD PDF...
Read More →Class 12 Maths Timetable to Study in Gap (PART-2)
Here is an Ultimate strategy time table to study in Gaps. You can also Download PDF from the given link below: Timetable to Study in Gap - DOWNLOAD PDF...
Read More →Class 12 Maths Timetable to Study in Gap (PART-1)
Here is an Ultimate strategy time table to study in Gaps. You can also Download PDF from the given link below: Timetable to Study Between Gaps - Download PDF...
Read More →True Dip and Apparent Dip - Magnetism and Matter Class 12
Here we will study about True Dip and Apparent Dip. Apparent Dip India's Best Exam Preparation for Class 12th - Download Now The dip at a place is determined by a dip circle. It consists of a magnetized needle capable of rotation in a vertical plane about a horizontal axis. The needle moves over a vertical scale graduated in degrees. If the plane of the scale of the dip circle is not in the magnetic meridian then the needle will not indicate the correct direction of the earth's magnetic field. T...
Read More →Intensity of Magnetization - Magnetism and Matter Class 12
Intensity of Magnetization represents the extent to which a specimen is magnetised when placed in a magnetising field. Or in other words the intensity of magnetisation is defined as the magnetic dipole moment developed per unit volume when a magnetic material is subjected to magnetising field. Intensity of magnetisation $I =\frac{\text { magnetic dipole moment }}{\text { volume }}=\frac{M}{V}$ India's Best Exam Preparation for Class 12th - Download Now It is a vector quantity whose direction is ...
Read More →Magnetic Induction - Magnetism and Matters Class 12
Magnetic Induction Meaning: The process by which a substance, such as iron or steel, becomes magnetized by a magnetic field. The induced magnetism is produced by the force of the field radiating from the poles of a magnet. Let a uniform magnetising field $B_{0}$ represented by the parallel lines exist in vacuum. When a soft iron bar (ferromagnetic material) is placed inside the field it gets magnetised. The left end becomes Spole and right end becomes N pole. It produces its own magnetic field. ...
Read More →Properties of Diamagnetic Substances - Magnetism and Matters Class 12
Diamagnetic materials are those that some people generally think of as non-magnetic, and include water, wood, most organic compounds such as petroleum and some plastics, and many metals including copper, particularly the heavy ones with many core electrons, such as mercury, gold and bismuth. The substances which when placed in a magnetic field are feebly magnetised in a direction opposite to that of the magnetising field are called diamagnetic substances. Here we will study about the properties ...
Read More →Relation Between Magnetic Permeability and Susceptibility - Class 12 Physics
Permeability is the measure of the ability of a material to support the formation of a magnetic field within itself. In other words, it is the degree of magnetization that a material obtains in response to an applied magnetic field. The magnetic susceptibility is a dimensionless proportionality constant that indicates the degree of magnetization of a material in response to an applied magnetic field. Relative permeability, sometimes denoted by the symbol μr, is the ratio of the permeability of a...
Read More →Difference Between Soft and Hard Magnetic Materials - Magnetism and Matters
Hard magnetic materials are difficult to magnetize and demagnetize, such as tungsten steel, ferrite, neodymium-iron-boron, etc. These materials are easy to magnetize and difficult to demagnetize. They are mainly used as tape materials and permanent magnets. Soft magnetic materials refer to ferromagnetic materials with narrow hysteresis loops, high permeability, low remanence, low coercivity and low magneto resistance. Difference Between Soft and Hard Magnetic Materials are as Follows: Comparison...
Read More →Magnetic Susceptibility and Permeability - Magnetism and Matters
The key difference between magnetic susceptibility and permeability is that magnetic permeability describes the ability of a material to support the formation of a magnetic field inside itself whereas susceptibility describes whether a material is attracted to a magnetic field or is repelled from it. Magnetic Susceptibility Magnetic Permeability Magnetic Susceptibility The magnetic susceptibility of a magnetic substance is defined as the ratio of the intensity of magnetisation to magnetic intens...
Read More →Magnetic Hysteresis - Class 12 Magnetism and Matter
Magnetic hysteresis occurs when an external magnetic field is applied to a ferromagnet such as iron and the atomic dipoles align themselves with it. Even when the field is removed, part of the alignment will be retained: the material has become magnetized. Once magnetized, the magnet will stay magnetized indefinitely. The lagging of intensity of magnetisation (I) or magnetic induction (B) behind the magnetising field (H) during the process of magnetisation and demagnetisation of a ferromagnetic ...
Read More →Magnetic Intensity Definition, Formula - Class 12 Magnetism and Matters
Magnetic Intensity Definition: The degree to which a magnetic field can magnetise a substance or the capability of external magnetic field to magnetise the substance is called magnetic intensity. The magnetic field produced by the external source of current is called magnetising field. The magnetising field depends on external free currents and geometry of current carrying conductor. Magnetic intensity at a point in a magnetic field is defined as the number of magnetic lines of force passing nor...
Read More →Properties of Paramagnetic Substance Material - Class 12 Magnetism & Matters
The substances are weakly attracted by the magnetic field. In the non-uniform external magnetic field, paramagnetic substances move from week field region to a strong field region. A paramagnetic rod sets itself parallel to the field because the field is strongest near poles. properties of Paramagnetic Substance Material are as follows: PROPERTIES OF PARAMAGNETIC SUBSTANCES MATERIAL The substances which when placed in a magnetising field get feebly magnetised in a direction parallel to magnetisi...
Read More →Neutral Point of Magnet - Magnetism and Matter Class 12 Physics Notes
A neutral point of Magnet is a point at which the resultant magnetic field is zero. In general, the neutral point is obtained when a horizontal component of the earth's field is balanced by the produced by the magnet. When the N pole of the magnet points South and the magnet in the magnetic meridian. When we plot the magnetic field of a bar magnet the curves obtained represent the superposition of magnetic fields due to bar magnet and earth. India's Best Exam Preparation for Class 12th - Downloa...
Read More →Properties of Diamagnetic Materials - Magnetism & Matters | Class 12 Physics Notes
Here we will study about the Paramagnetic and Diamagnetic Materials. Properties of Diamagnetic Materials Paramagnetic Substances also discussed in this article. Diamagnetic Materials The substances which when placed in a magnetising field get feebly magnetised in a direction opposite to magnetising field are called diamagnetic. The substances are weakly repelled by the field so in a non uniform field these have a tendency to move from strong to weak field. A diamagnetic rod sets itself perpendic...
Read More →Vibration Magnetometer - Magnetism and Matter || Class 12 Physics Notes
Vibration magnetometer is used for comparison of magnetic moments and magnetic fields. This device works on the principle, that whenever a freely suspended magnet in a uniform magnetic field, is disturbed from it's equilibrium position, it starts vibrating about the mean position. Vibration Magnetometer It is an instrument used to compare magnetic moments of two bar magnets, comparison of horizontal components of earth's magnetic field at two places and for measuring the horizontal component of ...
Read More →Tangent Galvanometer Experiment - Construction & Working || Class 12 Physics Notes
Tangent galvanometer is an early measuring instrument for small electric currents. It consists of a coil of insulated copper wire wound on a circular non-magnetic frame. Its working is based on the principle of the tangent law of magnetism. When a current is passed through the circular coil, a magnetic field (B) is produced at the center of the coil in a direction perpendicular to the plane of the coil. Here we will study about the Tangent Law and Tangent Galvanometer Experiment with Constructio...
Read More →Bar Magnet as an Equivalent Solenoid - Magnetism || Class 12 Physics Notes
Bar Magnet as an Equivalent Solenoid In solenoid each turn behaves as a small magnetic dipole having dipole moment $\mathrm{I} \mathrm{A}$. A solenoid is treated as arrangement of small magnetic dipoles placed in line with each other. The number of dipoles is equal to number of turns in a solenoid. The south and north poles of each turn cancel each other except the ends. So solenoid can be replaced by single south and north pole separated by distance equal to length of solenoid. The magnetic fie...
Read More →Cause of Earth Magnetism - Earth's Magnetism || Class 12 Physics Notes
Cause of Earth Magnetism Sir William Gilbert first suggested the existence of a powerful magnet inside the earth. This is not possible because. (a) Temperature inside earth is so high that it will not be possible for magnet to retain magnetism. (b) If there was a magnet inside the earth then position of earth's magnetic poles would have not changed. (c) The process of magnetization of this magnet is not understood. Grover suggested that earth's magnetism is due to flow of current near outer surf...
Read More →Terrestrial Magnetism - Earth's Magnetism || Class 12 Physics Notes
Do you know that the Earth is also a magnet? Yes!!! How do you think then that the suspended bar magnet always points in the north-south direction? Adware about the concept of the Terrestrial Magnetism that we are going to discuss in this chapter. It is really interesting to study and analyze this concept of earth’s magnetism. The branch of Physics which deals with the study of earth's magnetic field is called terrestrial magnetism. William Gilbert suggested that earth itself behaves like a huge...
Read More →Magnetic Elements - Magnetism Class 12 || Physics Notes
The physical quantities which determine the intensity of earth's total magnetic field completely both in magnitude and direction are called magnetic elements. Angle of Declination $(\phi)$: The angle between the magnetic meridian and geographic meridian at a place is called angle of declination. (a) Isogonic Lines : Lines drawn on a map through places that have same declination are called isogonic lines. (b) Agonic Line : The line drawn on a map through places that have zero declination is known...
Read More →Bohr Magneton: Unit of Bohr Magneton - Magnetism || Class 12 Physics Notes
Bohr Magneton is defined as the magnetic dipole moment associated with an atom due to orbital motion of an electron in the first orbit of hydrogen atom. This is the smallest value of magnetic moment. Unit of Bohr Magneton is- In CGS units it is defined by the equation: $\mu \mathrm{B}=(e \cdot h) / 2 m_{\mathrm{e}} \mathrm{c}$ In SI units it is defined by the equation: $\mu_{\mathrm{B}}=e \cdot h / 2 m_{e}$ The electron possesses magnetic moment due to its spin motion also $\overrightarrow{ M }_...
Read More →Current loop as a Magnetic Dipole - Magnetism | Class 12th Physics Notes
Current loop as a Magnetic Dipole Ampere found that the distribution of magnetic lines of force around a finite current-carrying solenoid is similar to that produced by a bar magnet. This is evident from the fact that a compass needle when moved around these two bodies shows similar deflections. After noting the close resemblance between these two, Ampere demonstrated that a simple current loop behaves like a bar magnet and put forward that all the magnetic phenomena are due to circulating elect...
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