PHYSICS - LONG QUIZ

• Capacitor


  A device that stores electric charge and electrical energy
• Vacuum


  Space between capacitors
• Vacuum capacitor


  Space between capacitors may simply be a vacuum, and, in that case, a capacitor may be known
• Dielectric


  An insulating material that usually filled the space between capacitors
• Parallel-plate capacitor


  • It has two identical conducting plates, each having a surface area (A), separated by distance (d)
  • When voltage (V) is applied to the capacitor, it stores a Charge (Q)
• Capacitance


  Defined as the ratio of the max. Charge (Q) that can be stored in a capacitor to the applied voltage (V) across its plates
• Farad


  Standard unit for Capacitance and named after Michael faraday
• Dielectric values


  • Air: 1.000586
  • Asphalt: 2.7
  • Bengala: 2.6
  • Calcium: 3
  • Dolomite: 3.1
  • Flexible glass: 3.45
  • Glass bead: 3.1
  • Silicon: 2.4
  • Vacuum: 1
• Parallel connection


  • It is a type of connection wherein capacitors are connected by multiple lines of wire
  • QTotal = Q1 + Q2 + ……. QN : wherein Q is charge
  • CTotal = C1 + C2 + ……. CN
  • ΔVTotal = ΔV1= ΔV2 = ……. ΔVN
• Series connection


  • A connection wherein capacitors are connected by a single wire or line
  • QTotal = Q1 = Q2 = ……. QN
  • 1CTotal = 1C1 + 1C2 + ......... 1CN
  • ΔVTotal =ΔV1 +ΔV2 +.......... ΔVN
• Electrostatic potential energy


  Refers to the energy stored in a capacitor