# Unit Two

Getting Started:

Print this exercise out by first selecting this frame (click anywhere on this text), and then select the "Print" or "Print Frame" option in your browser's File menu. Once printed, complete all questions while referring to your notes, and Unit 2 of the text.

The Exercise:

Calculate the values in the following questions using the formula charts located on pages 40 and 41 of your text. Do all your rough work on a separate sheet of paper. When satisfied with your answers, neatly enter (print) your complete formulated results. Show all steps in the calculation in the space provided below each question.

### 1:

If lamp L1, in Figure 2-8a has a resistance of 10 ohms, and an applied voltage (battery voltage) of 12V; How much current will be flowing in the circuit?

### 2:

If lamp L1, in Figure 2-8a has a voltage drop of 6V and has a current of 1.2A flowing through it; What is the lamp resistance?

### 3:

If the circuit in Figure 2-8a has a current flow of 2 Amps, and the resistance of lamp L1 is known to be 8 ohms; Calculate what the voltage output of the battery is.

### 4:

If the lamp in Figure 2-8a, passes 1.5 amps of current at 12V; What is the wattage of the bulb?

### 5:

If the lamp in Figure 2-8a, was a 100 watt bulb rated at 12V; How much current would the battery need to supply?

### 6:

The lamp in Figure 2-8a, is known to have a resistance of 18 ohms, and the battery has an output of 12VDC; What is the wattage of the bulb?

### 7:

If R1, in Figure 2-16a has a resistance of 6.8 ohms, and is known to be discipating 20 watts of power; What is the voltage output of the battery?

### 8:

If R1, in Figure 2-16a has a resistance of 6.8 ohms, and is known to be discipating 20 watts of power; How much current is flowing in the circuit?

### 9:

If R1, in Figure 2-16a has a resistance of 100 ohms, and has 100ma of current passing through it; How much power is it discipating?

### 10:

If the battery, in Figure 2-16a has an output of 12 volts and R1 is discipating 40 watts; What is the resistance of R1?

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