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19. Five resistors, each of 3 ohm are connected as shown in Fig 8.50. Calculate the resistance (a) between thepoints P and Q, and (b) between the points X and Y.322232302322302 |
| Answer» TION:Where are points X and Y? To simplify,PQ has 2 resistors of 3 ohm connected in series, the resultant of which is connected in PARALLEL to another 3 ohm resistor.R net = R1 + R2 in a series=> R net = 3 + 3= 6 ohms Now we have this 6 ohm resistor connected in parallel with a 3 ohm resistor. R net = [ 1/R1 + 1/R2 ]^-1= [ 1/6 + 1/3 ]^-12 ohms Hence the resistance between points P and Q is 2 ohms. Assuming that the points X and Y are including the other 2 resistances of 3 ohms each, the resistors 3 ohms 2 ohms and 3 ohms are in series Hence the total resultant resistance ( bet. X and Y) = 2 + 3 + 3= 8 ohms | |