Electric current and resistance
Electric Current is the rate of flow of electrons in a conductor. The SI Unit of electric current is the Ampere. Electrons are minute particles that exist within the molecular structure of a substance. Sometimes, these electrons are tightly held, and other times they are loosely held.
The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance, measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction. The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S) (formerly called the 'mho' and then represented by ℧).
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| Header | Header | Header |
|---|---|---|
| Chapter :-1 | Electric charge | Download |
| Chapter :-2 | Electric field | Download |
| Chapter :-3 | Electrostatic potential and flux | Download |
| Chapter :-4 | Capacitance | Download |
| Chapter :-5 | Electric current and resistance | Download |
| Chapter :-6 | Electrical measurement | Download |
| Chapter :-7 | Heating effect of electric current | Download |
| Chapter :-8 | Magnetic field due to electric current | Download |
| Chapter :-9 | Motion of charged particles in electric and magnetic fields |
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| Chapter :-10 | Magnets and earth magnetism | Download |
| Chapter :-11 | Electromagnetic induction | Download |
| Chapter :-12 | Alternating current | Download |
| Chapter :-13 | Reflection of light | Download |
| Chapter :-14 | Refraction of light | Download |
| Chapter :-15 | Dispersion of light | Download |
| Chapter :-16 | Optical instrument | Download |
| Chapter :-17 | Huygen's principle and interference | Download |
| Chapter :-18 | Diffraction and polarisation | Download |
| Chapter :-19 | 19.semi conductor | Download |
| Chapter :-20 | Dual nature of light | Download |
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