Engineering Math 2 Qn!

• bananaking

  29 Dec 09, 12:44

  hey guys hope u can offer me some help! (: question are at below!

   

  Problem A

  A LCR circuit consisted of a resistor R, a capacitor C and an inductor L connected in series together with a switch and a voltage source E. Prior to closing the switch at the start at the start, there is no current and no charge on the capacitor. Determine the charge q(t) on the capacitor and current i(t) in the circuit at time t given that R=160 ohms, L=1H, C=10^-4 F and E=20V.

  State:

               (a) Kirchoff’s Law

               (b) The formulae for voltage drops across R, L and C

               (c) The relationship between charge and current.

  Thanks guys! (:

• bananaking

  9 Jan 10, 03:14

  bump! sorry really need help on this ques! anyone could kindly give me a push? thanks!

• syncopation_music

  9 Jan 10, 22:24

  This law is also called Kirchhoff's point rule, Kirchhoff's junction rule (or nodal rule), and Kirchhoff's first rule.

  The principle of conservation of electric charge implies that:

  At any node (junction) in an electrical circuit, the sum of currents flowing into that node is equal to the sum of currents flowing out of that node.

  [edit] Kirchhoff's voltage law (KVL)

  

  The sum of all the voltages around the loop is equal to zero. v₁ + v₂ + v₃ + v₄ = 0

  This law is also called Kirchhoff's second law, Kirchhoff's loop (or mesh) rule, and Kirchhoff's second rule.

  The directed sum of the electrical potential differences around any closed circuit must be zero.

  lazy to find wikipedia lah u :)

   

  Voltage Drop across R isnt V/R meh ?

  L is the formulae for Inductance

  and C is the formulae for C

   

  relationship between charge and curent ..is when the circuit is open or closed ?

  how to answer u when u havent indicate what u want ..

   

  I think all this is in ur notes .you have difficulty understanding it ?