C cagri35 New Member Jan 12, 2012 #1 what is the R ? and how is the solving ? Attachments ques.JPG 6.5 KB · Views: 154
D Diver300 Well-Known Member Most Helpful Member Jan 12, 2012 #2 12.5 kohms R1 has no current in it because there is no voltage across it. So it can be ignored. The current in R2 is 0.2 mA, and all of that has to go though R, so R has to be 12.5 kohm to have 2.5 V across it and 0.2 mA through it.
12.5 kohms R1 has no current in it because there is no voltage across it. So it can be ignored. The current in R2 is 0.2 mA, and all of that has to go though R, so R has to be 12.5 kohm to have 2.5 V across it and 0.2 mA through it.
C colin55 Well-Known Member Jan 13, 2012 #3 I did it a different way. Remove the -200mv You need 12 1k resistors and one 500R to produce 200mV at the join of each resistor. Put the 1k into circuit with -200mV on it and the join sees 0v. This means R is 11k5.
I did it a different way. Remove the -200mv You need 12 1k resistors and one 500R to produce 200mV at the join of each resistor. Put the 1k into circuit with -200mV on it and the join sees 0v. This means R is 11k5.