Qualification > Sciences

physics doubt!!!!!!!!!!!!!!!!!!!!!!!!!

(1/1)

halosh92:
HEY
i have a doubt in physics CIE ASlevel
OCT/NOV 2008
QP 2
Q 7b  2nd part.

astarmathsandphysics:
In 3 hours

astarmathsandphysics:
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

halosh92:

--- 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

--- End quote ---

 thankx alot!!!

Navigation

[0] Message Index