**Figure 7-26: Determining Resistance Values Using Colors and Calculating Missing Electrical Values** This diagram illustrates a circuit with multiple resistors connected to a voltmeter. The voltmeter reads 5.45 volts. Four resistors, each with different color bands, are shown. Each resistor is labeled with its position (P), resistance (R), current (I), and voltage (E). Total values for the circuit are also labeled as total voltage (ET), total resistance (RT), and total power (PT). ### Resistor and Circuit Details: - **Resistor P1**: - Located at the top. - Bands: Yellow, Violet, Brown, Gold. - Associated values: E1, R1, I1. - **Resistor P2**: - Second from the top. - Bands: Red, Red, Yellow, Gold. - Associated values: E2, R2, I2. - **Resistor P3**: - Third from the top. - Bands: Brown, Black, Orange, Gold. - Associated values: E3, R3, I3. - **Resistor P4**: - Located at the bottom. - Bands: Yellow, Violet, Brown, Gold. - Associated values: E4, R4, I4. ### Instructions: 1. Use the color code on the resistors to determine the resistance values for each. 2. Use Ohm’s Law and other electrical principles to calculate any missing electrical values, such as voltage across each resistor (E), current through each resistor (I), and power for the entire circuit (PT).

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KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.