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Electronics A Guide for Physicists (DRAFT -- in development)

Derek J. Thuecks

Section 2.9 Problems

  1. For the circuit in Figure 2.9.1, calculate the voltage at points A, B, and C if (a) A is the common, (b) B is the common, and (c) C is the common.
    Figure 2.9.1.
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  2. In the circuit shown in Figure 2.9.2, calculate the voltages at points A, B, and C.
    Figure 2.9.2.
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  3. A fixed \(1.0\text{k}\Omega\) resistor and a \(4.0\text{k}\Omega\) potentiometer are connected in series across a 5V battery of negligible internal resistance. Calculate the maximum and minimum values of \(V_{AB}\) based on possible potentiometer settings. (See Subsection 11.4.2 for an explanation of potentiometers.)
    Figure 2.9.3.
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  4. Calculate the current \(I\) in Figure 2.9.4.
    Figure 2.9.4.
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  5. Calculate the equivalent resistance beetween points A and B in Figure 2.9.5.
    Figure 2.9.5.
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  6. Calculate \(I_1\) and \(I_2\) in Figure 2.9.6.
    Figure 2.9.6.
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  7. Calculate values and directions for all unknown currents in Figure 2.9.7. Please use the mesh method as it is likely the shortest path to the solution. [UPDATED SINCE ASSIGNED SP25]
    Figure 2.9.7. [UPDATED SINCE ASSIGNED SP25]
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  8. Calculate the Thevenin equivalents for the circuit in Figure 2.9.8.
    Figure 2.9.8.
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  9. Calculate the Thevenin equivalents for the circuit in Figure 2.9.9.
    Figure 2.9.9.
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