Hi, I am reading the textbook about DC circuits from this page. Its awesome but I think i found some nonsence. (I also think this was discussed here on this forum but I havent found it).
So, to the problem.
I am currenty on 7.4 chapter - COMPONENT FAILURE ANALYSIS
The textbook shows there example of 4 resistors connected like this : (R1//R2)--(R3//R4). We are solving what happens when R2 fails.
So the total resistance of R3//R4 is same as they are working as before. Trouble is that when R2 burns we have only R1. The textbook says that the total resistance of R1//R2 is lower after R2 burns. But I think its not true. Cos when 2 resistors are in parallel the total resistance is lower than value of the lowest resistor.
And when 2 is turned off the total resistance raises, but the texbook says the opposite : R of (R1//R2) > R of (R1).
Am I right or I've missed something
(i've built this circuit on my breadboard and it works the way i said...)
So, to the problem.
I am currenty on 7.4 chapter - COMPONENT FAILURE ANALYSIS
The textbook shows there example of 4 resistors connected like this : (R1//R2)--(R3//R4). We are solving what happens when R2 fails.
So the total resistance of R3//R4 is same as they are working as before. Trouble is that when R2 burns we have only R1. The textbook says that the total resistance of R1//R2 is lower after R2 burns. But I think its not true. Cos when 2 resistors are in parallel the total resistance is lower than value of the lowest resistor.
And when 2 is turned off the total resistance raises, but the texbook says the opposite : R of (R1//R2) > R of (R1).
Am I right or I've missed something
(i've built this circuit on my breadboard and it works the way i said...)