The characteristics of parallel-connected resistors can be summarized as follows: Note that the two ends of the resistors are connected to the same two points. Resistors are connected in parallel by connecting them side by side across one another, as illustrated in Figure 6.
Determine the series dropping resistance value and wattage required. You have a 120-V source and want to use a series dropping resistor in conjunction with a 6 V 150 mA pilot light to indicate when power is applied ( Figure 5). If an input voltage of 9 volts is applied to the circuit, calculate the value of the voltage drop across each of the resistors, using the voltage divider formula. Resistors R 1 (5 kΩ), R 2 (3 kΩ), and R 3 (2 kΩ) are connected in series to form a voltage divider as shown in Figure 4. The voltage divider formula allows you to calculate the voltage drop across any one of the resistors connected in series without having to first calculate the value of circuit current. The voltage drop across any one resistor is proportional to the ratio of its resistance value to that of the total circuit resistance.
Voltage dividers are widely used in circuits where a single voltage source must supply several different voltage values for different parts of a circuit. Resistors connected in series are used as voltage dividers, as illustrated in the circuit of Figure 3. Determine the value of the total combined circuit resistance. Problem: Three resistors, R 1 (4 Ω), R 2 (50 Ω), and R 3 (75 Ω) are connected in series as shown in Figure 2.
Calculate the resistance and wattage value for a series voltage dropping resistor.Show how resistors are used as voltage and current dividers.Calculate the total resistance of different resistor combinations i.e., series, parallel, and series-parallel.