Physics 12th

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Magnetic field due to different shaped current carrying conductors- P10 13.02

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THE PHYSICS CAFE                                                                CHAPTER THIRTEEN – MAGNETIC EFFECTS OF ELECTRIC CURRENT 13.02 Magnetic field due to different shaped current carrying conductors   Hans Christian Oersted Experiment: - a link between Electricity and Magnetism i.e. electric current se magnetism banta h A compass was placed near a current carrying wire and observed Switch Current in wire Deflection in compass Switch off I = 0 nil Switch on I ≠ 0 Deflect Switch off I = 0 nil Switch on I ≠ 0 Deflect Direction of current is changed in the wire Switch Current in wire ...
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PHYSICS 10TH CH10 LIGHT - TOPIC 1.10 - 1.12

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THE PHYSICS CAFE                       CHAPTER TEN - LIGHT - REFLECTION AND REFRACTION   1.10 Sign Convention for Spherical Mirrors**                                                              We will have to use some sign convention for solving the mirrors related problems is called sign convention . Assume origin of Cartesian coordinate system is concentric with pole of mirror and the object is placed at left side of mirror so that light ray fall on mirror from left-hand side. Then following conventions are All the distances are measured from pole. All the distance measured right sides of the pole are taken as positive. All the distance measured left sides of the pole are taken as negative. All the distance measured above the pole (principal axis...
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NCERT 10TH CHAPTER 10 LIGHT - WORD MEANINGS

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THE PHYSICS CAFE                                  CHAPTER TEN LIGHT - REFLECTION AND REFRACTION Light – an energy, which helps to see objects. Ray - single light propagation Reflection – process of sending back light Refraction – process of bending of light when light changes medium Medium – the arrangement (in which substances are equi-spaced or absent) in which light can travel   Propagation – travelling of anything is called propagation of that thing Transparent – through which we can see Opaque - through which we cannot see Optical - of light Rare – more gap between particles Denser – lesser gap in particles Normal – Perpendicular (anything at 90˚) Plane – 2 dimensional surfaces Medium separating surface – the surface where two different mediums meets Gradually – slowly Virtual – not real Real - actual Erect – head is upside Inverted – h...
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PHYSICS 10 CH10 LIGHT - TOPIC 1.13 & 1.14

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THE PHYSICS CAFE                                                          CHAPTER TEN - LIGHT - REFLECTION AND REFRACTION 1.13 Refraction of Light (Snell’s Law) and related terms* When light changes medium, its speed as well direction get changed this activity is called Refraction of light Refraction of Light: The phenomenon of “bending of light by the surface of the object when light changes medium” is called Refraction of light. Rules for change in direction (bending): If light coming from rare medium and entering into denser medium – Bends towards normal If light coming from denser medium and entering into rare medium – Bends away from normal Hint: More denser medium towards right – vacu...
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