The radio amateur needs a 70 kOhm resistor. He found three resistors with resistances of 100, 50 and 25 kOhm. How can he get the resistance he needs? Draw a diagram.
Can. The first and third conductors must be connected in parallel, and the second must be connected in series to them. In this case, the resistance of the circuit is: R = (R1 * R3) / (R1 + R3) + R2 = (100 * 25) / (100 + 25) +50 = 70 Ohm.
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