« previous next »
Pages: [1]   Go Down

Author Topic: physics doubt!!!!!!!!!!!!!!!!!!!!!!!!!  (Read 789 times)

Offline halosh92

  • SF Senior Citizen
  • *****
  • Posts: 730
  • Reputation: 1113
  • Gender: Female
    • meticulous-me
physics doubt!!!!!!!!!!!!!!!!!!!!!!!!!
« on: December 02, 2009, 04:21:52 pm »
HEY
i have a doubt in physics CIE ASlevel
OCT/NOV 2008
QP 2
Q 7b  2nd part.
Logged
everyday we wake up is a miracle, then how do we say miracles dont happen?????

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: physics doubt!!!!!!!!!!!!!!!!!!!!!!!!!
« Reply #1 on: December 02, 2009, 06:40:37 pm »
In 3 hours
Logged

Offline astarmathsandphysics

  • SF Overlord
  • *********
  • Posts: 11271
  • Reputation: 65534
  • Gender: Male
  • Free the exam papers!
Re: physics doubt!!!!!!!!!!!!!!!!!!!!!!!!!
« Reply #2 on: December 02, 2009, 10:23:01 pm »
voltage across 5000 ohm resistor is 6-3.6=2.4V
resistance of 5000 ohm resistor -thermistor combination =2.4/3.6*2000=4000/3 ohms
1/R=1/R1+1/R2
3/4000=1/5000+1/R2
1/R2=3/4000-1/5000=11/20000
r2=20000/11 ohms
Logged

Offline halosh92

  • SF Senior Citizen
  • *****
  • Posts: 730
  • Reputation: 1113
  • Gender: Female
    • meticulous-me
Re: physics doubt!!!!!!!!!!!!!!!!!!!!!!!!!
« Reply #3 on: December 03, 2009, 07:29:30 am »
Quote from: astarmathsandphysics on December 02, 2009, 10:23:01 pm
voltage across 5000 ohm resistor is 6-3.6=2.4V
resistance of 5000 ohm resistor -thermistor combination =2.4/3.6*2000=4000/3 ohms
1/R=1/R1+1/R2
3/4000=1/5000+1/R2
1/R2=3/4000-1/5000=11/20000
r2=20000/11 ohms

 thankx alot!!!
Logged
everyday we wake up is a miracle, then how do we say miracles dont happen?????
Pages: [1]   Go Up
« previous next »