Electricity: विद्युत Top 40 #allcomptetiveexams

Electricity: विद्युत Top 40 #allcomptetiveexams Discription explain 👇 Electricity: विद्युत top 40 All competitive exams discription explain Electricity (विद्युत) — Top 40 Important Points for Competitive Exams 1. Electricity (विद्युत) Electricity is the flow of electric charge (mostly electrons) through a conductor. 2. Electric Charge (वैद्युत आवेश) Two types: Positive (+) Negative (−) Unit: Coulomb (C) 3. Coulomb’s Law Force between two charges: F = k q 1 q 2 r 2 F=k r 2 q 1 q 2 k = 9 × 10 9   N m 2 / C 2 k=9×10 9 Nm 2 /C 2 Like charges repel, unlike attract. 4. Electric Current (विद्युत धारा) Rate of flow of charge. I = Q t I= t Q Unit: Ampere (A) 5. Conventional Current Flows from positive to negative terminal. 6. Electron Flow Actual electron movement is from negative to positive terminal. 7. Potential Difference (Voltage) Work done to move charge. V = W Q V= Q W Unit: Volt (V) 8. Resistance (प्रतिरोध) Opposition to current flow. Unit: Ohm (Ω) 9. Ohm’s Law At constant temperature: V = I R V=IR Where: V = Voltage I = Current R = Resistance 10. Conductors Allow electricity to pass. Examples: Copper Aluminium Silver