Electricity	
  
The	
  Power	
  of	
  Life	
  
Outline	
  of	
  the	
  Presenta6on	
  

I.  Charges	
  
II. Current	
  
III. Voltage	
  
What	
  are	
  charges?	
  
	
  	
  An	
  atom	
  with	
  one	
  or	
  more	
  electrons	
  
missing	
  becomes	
  charged...
Electrical	
  Forces	
  and	
  Charges	
  
The	
  fundamental	
  rule	
  at	
  the	
  base	
  of	
  all	
  
electrical	
  ...
How	
  charges	
  are	
  transferred?	
  
When	
  electrons	
  are	
  transferred	
  from	
  the	
  fur	
  to	
  
the	
  r...
Charging	
  by	
  Induc6on	
  
Principle	
  of	
  Conserva=on	
  of	
  Charge	
  
	
  
Electrons	
  are	
  neither	
  created	
  nor	
  destroyed	
  but	...
What	
  is	
  a	
  Current?	
  
Current	
  is	
  the	
  movement	
  of	
  charges	
  in	
  a	
  circuit	
  
Electric	
  cu...
What	
  is	
  Voltage	
  
Voltage	
  provides	
  the	
  energy	
  to	
  move	
  
the	
  charges.(electrons)	
  
	
  
	
  
...
Voltage	
  Source	
  
Power	
  u6li6es	
  use	
  electric	
  generators	
  to	
  
provide	
  the	
  120	
  volts	
  delive...
References	
  
www.hyperphysics.com	
  
	
  
ET213 - Group 3: Electricity
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ET213 - Group 3: Electricity

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The Power of Life

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ET213 - Group 3: Electricity

  1. 1. Electricity   The  Power  of  Life  
  2. 2. Outline  of  the  Presenta6on   I.  Charges   II. Current   III. Voltage  
  3. 3. What  are  charges?      An  atom  with  one  or  more  electrons   missing  becomes  charged.   Two  Types  of  Charges:   Posi6ve  Charge-­‐  protons  exceeds  the   number  of  electrons  (+)  Ex.  Na+   Nega6vely  Charge-­‐electrons  exceeds   the  number  of  electrons.(-­‐)  Cl-­‐  
  4. 4. Electrical  Forces  and  Charges   The  fundamental  rule  at  the  base  of  all   electrical  phenomena  is  that  like  charges   repel  and  opposite  charges  a9ract.        
  5. 5. How  charges  are  transferred?   When  electrons  are  transferred  from  the  fur  to   the  rod,  the  rod  becomes  nega6vely  charged.  
  6. 6. Charging  by  Induc6on  
  7. 7. Principle  of  Conserva=on  of  Charge     Electrons  are  neither  created  nor  destroyed  but   are  simply  transferred  from  one  material  to   another.  
  8. 8. What  is  a  Current?   Current  is  the  movement  of  charges  in  a  circuit   Electric  current  is  measured  in  amperes,     symbol  A.   An  ampere  is  the  flow  of  one  coulomb  of  charge  per  second.   When  the  flow  of  charge  past  any  cross  sec6on  is  1  coulomb   (6.24  billion  billion  electrons)  per  second,  the  current  is  1   ampere  
  9. 9. What  is  Voltage   Voltage  provides  the  energy  to  move   the  charges.(electrons)             Important:  charges  cannot  move  in  a  circuit   without  poten6al  difference  across    
  10. 10. Voltage  Source   Power  u6li6es  use  electric  generators  to   provide  the  120  volts  delivered  to  home   outlets   This  means  that  120  joules  of  energy  is   supplied  to  each  coulomb  of  charge  that  is   made  to  flow  in  the  circuit.   A  baVery  is  another  source  of  voltage.  It  provide   varying  amounts  depending  on  its  nature  and  size.    
  11. 11. References   www.hyperphysics.com    

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