Question 227Electricity & Electronics - QMED

The correct answer is B) Always from the grounded end to point "TP5". In a simple series circuit with a DC power source, the direction of electron current flow is always from the negative terminal of the power source, through the load resistor, and back to the positive terminal. Since the grounded end of the circuit represents the negative terminal, the electron current will flow from the grounded end to point "TP5", which is connected to the positive terminal. The other options are incorrect because: A) the current does not always flow from "TP5" to the grounded end, B) is the correct answer, C) the direction of current does not depend on the instantaneous polarity at "T1", and D) the direction of current can be determined without a directional ammeter based on the basic principles of series circuits.