looking for help in solving combination circuits for dc electricity?

looking for help in solving combination circuits for dc electricity?
Combination Circuits: Review Questions 1. Refer to Figure 8 2. Replace the values shown with the following. Solve for all the unknown values. IT = 0.6 A R1 = 470 © R2 = 360 © R3 = 510 © R4 = 430 © Refer to Figure 8 5. Replace the values shown with the following. Solve for all the unknown values. ET = 63 V R1 = 1000 © R2 = 2200 © R3 = 1800 © R4 = 910 © R5 = 3300 © R6 = 4300 © R7 = 860 © 3. Refer to the circuit shown in Figure 8 2. Redraw the circuit and use the following values: ET = 12 V R1 = 270 © R2 = 510 © R3 = 470 © R4 = 330 © Assume that an ammeter indicates a total circuit current of 15 mA. A voltmeter indicates the following voltage drops across each resistor: E1 = 12 V E2 = 0 V E3 = 7 V E4 = 5 V What is the most likely problem with this circuit? 1. Refer to the circuit shown in Figure 8 22. The circuit has an applied voltage of 24 V and the resistors have values as follows: R1 = 1 k© R2 = 300 © R3 = 750 © R4 = 1 k© An ammeter and a voltmeter indicate the following values: IT = 42.5 mA I1 = 24 mA E1 = 24 V I2 = 18.5 mA E2 = 5.5 V I3 = 0 A E3 = 18.5 V I4 = 18.5 mA E4 = 18.5 V What is the most likely problem with this circuit? 2. Refer to Figure 8 21. Assume that the resistors have the following values: R1 = 150 © R2 = 120 © R3 = 47 © R4 = 220 © Assume that an ohmmeter connected across the entire circuit indicates a value of 245 ©. Does this reading indicate that there is a problem with the circuit and, if so, what is the most likely problem? FIGURE 8 21 Series -parallel circuit.