PhysicsKund Physics class 9 to 12 NCERT, JEE - NEET

Definition of Refraction of light : The change in direction of light when it passes from one medium to another obliquely is called refraction of light . In other words , the bending of light when it goes from one medium to another obliquely is called Refraction of light. Important terms Related to Refraction: The plane surface that refracts light is known as the surface of refraction. Point of incidence: The point on the surface of refraction , where the ray of light is incident is known as the point of incidence . "O" is the point of incidence. Incident Ray : The ray of light which strikes the surface of refraction at the point of incidence , is known as the incident Ray . AO is the incident Ray. Refracted ray : The ray which travels from the point of incidence to other medium is known as the refracted ray. OB is the refracted ray. Normal : Perpendicular drawn on the surface of refraction at the point of incidence is called normal. NON' is the normal on the surface PQ. A...

NCERT Solution Class 1O Science Chapter 12 Magnetic Effects of Electric Current  - Physicskund  Page number 196 1. Why does a compass needle get deflected when brought near a bar magnet? Solution : A compass needle is a small bar magnet when it is brought near a bar magnet its magnetic field lines interact with that of the bar magnet. Hence , a compass needle shows a deflection when brought near the bar magnet Example 12.1 A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it? Solution The current is in the east-west direction. Applying the right-hand thumb rule, we get that the magnetic field (at any point below or above the wire) turns clockwise in a plane perpendicular to the wire, when viewed from the east end, and anti-clockwise, when viewed from the west end. Page number 200 1. Draw magnetic field lines around a bar magnet. Solution : Magnetic field ...

NCERT Notes for Class 10 Science Physics Chapter 11 Electricity   is prepared and uploaded for reference by a team of expert members. Get NCERT Exercise Solution Class 10 Science Chapter 11 Electricity. Electricity :  Electricity is a controllable and convenient form of energy and defined as the flow of electric charge.   Electric Charge  :  Electric charge can be defined as a fundamental property of subatomic particles that gives rise to the phenomenon of experiencing force in the presence of electric and magnetic fields. Some  properties of electric charge 1.  Electric charges are of two types - Positive charges or protons have a charge of $+1.6 × 10^{-19}$ Coulomb. Negative charges or Electrons have a charge of $-1.6 × 10^{-19}$ Coulomb. 2. Charge is a scalar quantity. 3. Charge is transferable, Charge( Electron) transfer from one body to another. 4. Like charges repel each other and unlike. charges attract each other. 4. Charge is always ...

Notes NCERT Class 10 Science Chapter Wise - 1. Chemical Reactions and Equations 2. Acids, Bases, and Salts 3. Metals and Non-Metals 4. Carbon and Its Compounds 5. Periodic Classification of Elements 6. Life Processes 7. Control and Coordination 8. How Do Organisms Reproduce? 9. Heredity and Evolution Chapter 9. Light - Reflection and Refraction. Chapter 10. The Human Eye and The Colourful World. Chapter 11. Electricity Chapter 12. Magnetic effect of Electric current.

Notes for Refraction of light through a triangular glass prism - Class 10 Science Chapter 10 The Human Eye and the Colourful World is prepared by our senior and renowned teachers What is Prism:  triangular glass prism has two triangular bases and three rectangular lateral surfaces. These surfaces are inclined to each other. The angle between its two lateral faces is called the angle of the prism. Reason behind Bending of light Through prism :   As per Snell’s law, light travelling from a rarer medium to a denser medium bends towards the normal, and vice versa. Glass is denser than air, and thus, when a ray of light falls on the surface of the prism, it bends towards the normal. According to the diagram, ray PE falls on the surface of the prism and bends towards the normal NE. Then, while moving from the glass to the air, the emergent ray FS bends away from the normal MF. What is Angle of deviation (D):  The angle between the direction of incident ray and the emerg...

NOTES for Class 10 Science Chapter 10 The Human Eye and the Colourful World is prepared and uploaded for reference by academic team of expert members. Get Notes of all chapters of NCERT class 10 Science. Notes Class 10 Science Chapter 10 The Human Eye and the Colourful World Functioning of a lens in human eye Power of Accommodation , near and far point of normal eyes. Defects of vision and their corrections. Refraction of light through a prism. Dispersion of light. Formation of Rainbow Atmospheric Refraction  Scattering of light : Tyndall effect , Sky blue colour , Colour of the sun at sunrise and sunset  

Notes Class 10 science Chapter 9 Reflection and Refraction of Light - Light and it's nature . Type of Medium For the Propagation of Light. Reflection and law of Reflection . Reflection of light by Mirror : Formation of image in a plane mirror   Define - Centre of curvature, principal axis, principal focus, focal length, mirror Images formed by concave mirrors . Images formed by convex mirrors . Use of Concave and convex mirror. Mirror Formula (Derivation not required), magnification. Sign convention for Spherical Mirrors. Definition of Refraction of light  | Important terms Related to Refraction | Cause of Refraction :  Optically Rarer and Denser medium . Refraction; Laws of refraction, refractive index.  Refraction of light by spherical lens; Image formed by convex lens. Image formed by concave lens. Sign convention, Lens formula , Magnification .  Use of convex and concave Lens. Power of a lens and it combination

NCERT Syllabus for Class 10 Physics - Physicskund  Unit III: Natural Phenomena Chapter 9 : Reflection and Refraction  Reflection of light by curved surfaces. Images formed by spherical mirrors, centre of curvature,principal axis, principal focus, focal length,  mirror formula ,magnification. Refraction; Laws of refraction, refractive index. Refraction of light by spherical lens;  Image formed by spherical lenses;  Lens formula; Magnification.  Power of a lens. Chapter 10 : Human Eyes  Functioning of a lens in human eye, defects of vision and their corrections, applications of spherical mirrors and lenses. Refraction of light through a prism,  dispersion of light,  scattering of light,  applications in daily life (excluding colour of the sun at sunrise and sunset). Unit IV: Effects of Current Chapter 11 : Effects of Current Electric current,  Potential difference Ohm’s law; Resistance,  Resistivity,  Factors on which t...

NCERT Solution Class 1O Science Chapter 12 Magnetic Effects of Electric Current  - Page number 196 1. Why does a compass needle get deflected when brought near a bar magnet? Solution : A compass needle is a small bar magnet when it is brought near a bar magnet its magnetic field lines interact with that of the bar magnet. Hence , a compass needle shows a deflection when brought near the bar magnet Example 12.1 A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it? Solution The current is in the east-west direction. Applying the right-hand thumb rule, we get that the magnetic field (at any point below or above the wire) turns clockwise in a plane perpendicular to the wire, when viewed from the east end, and anti-clockwise, when viewed from the west end. Page number 200 1. Draw magnetic field lines around a bar magnet. Solution : Magnetic field line...

NCERT Exercise Solution Class 10 Science Chapter 11 Electricity  Example 11.1 A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. Find the amount of electric charge that flows through the circuit. Solution: Given  I = 0.5 A ,   t = 10 min = 600 s. We have Q = It = 0.5 A × 600 s = 300 C Page Number 172 – Question with solution 1 to 3 : 1. What does an electric circuit mean? Solution : It is a continuous and closed path through which electric current flows. It contains different components like • Cell or Battery Plug Key • Wires • Electric Components (like Ammeter,Voltmeter) • Bulb etc  2. Define the unit of current. Solution :  The unit of electric current is ampere (A). I  = $\frac{Q}{t}$ When Q = 1 C and t = 1 sec then I = $\frac{1C}{1S}$ I = 1A 1 A is defined as the flow of 1 C of charge through a wire in 1 s. 3. Calculate the number of electrons constituting one coulomb of charge. Solution :  We know  Q...