Your Pregnant Congratulations Wording

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SUMMARY OF CURRENT

1. 
   Definition of electric current: power call
   the movement of charges (electrons) inside a conductor.
   For if there is power in a conductor is necessary
   among
   ends there is a potential difference . ( The difference
   potential between two points on a driver
   can be defined as the work required to carry the load
   drive from one point to another).

   
   

The electrical current is measured by the intensity
current (I )
which is defined as the charge that passes through
section of a conductor per unit of time. It is measured in amperes
(A). If the direction of the intensity is constant, the current is called continuous

I = q / t (if I = cte)

I generator (battery ) lineata de conexión e - interruptor receptor

The electrons move through the circuit from the point lower potential (pole - ) at higher potential (pole +), although the direction of flow is backwards.

2. Concept
   resistance (R) : is a measure of the opposition
   offering a conductor to passage of current.
   is measured in ohms (W ).
   resistance depends on the nature of the conductor
   ( r = resistivity) and its
   
   geometric (length L, section S)
   R = r L / S

   
   

Ohm law for a resistor R

The current intensity that flows through a thread is directly proportional to the potential difference between its ends and inversely proportional to a quality driver called resistance equal electrical

4. 
   Association of resistors

   
   

a)
Serial A
R ₁ C
R ₂ B
I
= common;
V _AC +V _CB =V _AB ; .
R = R ₁ + R _2
.

b)
En paralelo A
B
I
= I ₁
+ I ₂
; AB _V = common;

5. 
   Measures electrical quantities : To measure the intensity
   flowing through a circuit using the ammeter
   and placed in series, but instead to measure the potential
   differential between the terminals of a circuit element is used
   voltmeter and placed in parallel
   with the item.

   
   

6. Generators:
   are the devices that provide the energy needed to
   maintain the potential difference between ends a
   driver, with the goal of electric current in the circuit
   permanent. The energy supplied by the generator to the
   unit charge passing through it
   is called electromotive force (emf) and is measured in volts. and
   = W / q .

   
   

The generators are associated
:

and ₁
and ₂

a)
Serial :
and and _{= 1 +}
and ₂ r = R
1 + r 2

R _{1
R 2 and} 1, R
₁

b) In parallel

and
= and ₁ = and ₂


(for generators equal)

and 2, r
₂

7. 
   receivers (eg engines) : are devices that consume electrical energy
   transforming it into another type of energy.
   The power consumed by a receiver unit load
   called force (emf) and is measured in volts and '
   = W' / q

   
   

8. generalized Ohm's Law
   . If there
   external resistors, generators and motors
   is expressed by:

   
   

9. 
   Energy supplied or consumed by each circuit element:

   
   

• 
  E. produced by generators
  = W = and q = e
  I t

  
  

• 
  E. consumed by the generators
  I = W = 2
  rt

  
  

• 
  E.
  consumed by W = heat engines + Mechanical = I ²
  r 't + e ' t I
  

  
  

• 
  E.
  consumed by the external resistance R = W =
  2 R t

  
  

The energy consumed by the resistance usually emerges in
as heat ( Law Joule ):
as 1J = 0.24 cal ®
Q = 0.24 I
2 R t

10. The power of each
    circuit element:
    calculated by dividing the work between the time: example:
    power produced by generators: P = W / t = and
    q / t = and
    I

    
    

11. 
    To calculate the potential difference between two points on a circuit : V _A
    ± is _
    is '_
    SI R SI _ r _
    SI r' = V _B
    
    

    
    

where A is the point
before the effect of the intensity