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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.
  2. In the circuit shown in Figure 2.9.2, calculate the voltages at points A, B, and C.
    Figure 2.9.2.
  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.
  4. Calculate the current \(I\) in Figure 2.9.4.
    Figure 2.9.4.
  5. Calculate the equivalent resistance beetween points A and B in Figure 2.9.5.
    Figure 2.9.5.
  6. Calculate \(I_1\) and \(I_2\) in Figure 2.9.6.
    Figure 2.9.6.
  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]
  8. Calculate the Thevenin equivalents for the circuit in Figure 2.9.8.
    Figure 2.9.8.
  9. Calculate the Thevenin equivalents for the circuit in Figure 2.9.9.
    Figure 2.9.9.
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