PROBLEMS 157 2. Determine which resistors in Figure 4-65 are in series Show how

Question

PROBLEMS 157 2. Determine which resistors in Figure 4-65 are in series Show how to interconnect the pins to put all the resistors in series. 3 Determine the resistance between pins 1 and 8 in the circuit board in Pigure46 4. Determine the resistance between pins 2 and 3 in the circuit board in Figure 4-63. FIGURE 4-65 SECTION 4-2 Total Series Resistance 5. An 82 resistor and a 56 resistor are connected in series, what is the total resistance? 6. Find the total resistance of each group of series resistors shown in Figure 4-66. mn...w.s FIGURE 4-66 7. Determine Rr for each circuit in Figure 4-67. Show how to measure Ry with an ohmmeter 10 10 1.0 560 kn I.DMD +1.0kn 4.7k0 12 680 k2 1.0 10 Mn 2.2 k0 FIGURE 4-67

Explanation / Answer

3. Between pins 1 and 8 the resistors R13, R7, R14, R16 are connected in series.

5. When two resistors are connected in series, their total resistances are give by RT = R1 + R2.

Here R1= 82 OHM, R2= 56 OHM. So RT = 82 + 56 = 138 OHM(Ans).

7.

(a) RT = R1 + R2 + R3 = 1K + 4.7K + 2.2K = 7.9K OHM

(b) RT = R1 + R2 + R3 + R4 = 10 + 10 + 12+ 1.0 = 33.0 OHM

(c) RT = R1 + R2 + R3 + R4 + R5 = 1.0M + 560K + 1.0M + 680K + 10M = 12M + 1240K = 12000K + 1240K = 13240K OHM

Resistance can measured by Ohmmeter by connecting its measuring terminal pairs with the +, - terminals of the circuits. It can be connected with any polarity.

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