What is the direction of electron current...

Question 1 / 2707066636eed28f7522a1c51d4cb

Question 1 of 2707066636eed28f7522a1c51d4cb

What is the direction of electron current through the load resistor in the circuit shown in the illustration? Illustration EL-0085

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Question 1 of 27070

What is the direction of electron current through the load resistor in the circuit shown in the illustration? Illustration EL-0085

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🔍 Key Concepts

• Direction of conventional current vs electron current (they are opposite). • How the rectifier diodes (D1, D2) and transistor Q1 make the output across RL a unidirectional DC voltage with ground as the reference. • Role and polarity of CR1 and the grounded side of the circuit in setting which end of RL is more positive.

💭 Think About

• First, decide which end of RL (the TP5 end or the grounded end) is at the more positive potential during normal operation. • Then, think about the direction of conventional current through RL given that polarity, and finally reverse that direction to get the electron current direction. • Ask yourself: once the AC is rectified and filtered, can the polarity across RL ever reverse, or is it fixed by the diodes and transistor orientation?

✅ Before You Answer

• Verify which node (TP5 or ground) connects to the positive side of the rectified and filtered output. • Confirm the orientation of CR1’s arrow and Q1’s symbol to see which way conventional current is allowed to flow. • Before choosing, double‑check that you are answering for electron current, not conventional current, and reverse the direction if needed.

Question 1 of 27070

What is the direction of electron current through the load resistor in the circuit shown in the illustration? Illustration EL-0085

Always from point "TP5" to the grounded end.

Always from the grounded end to point "TP5".

It depends on the instantaneous polarity at "T1".

It cannot be determined without a directional ammeter.

Question 1 / 2707066636eed28f7522a1c51d4cb

Question 1 of 2707066636eed28f7522a1c51d4cb

What is the direction of electron current through the load resistor in the circuit shown in the illustration? Illustration EL-0085

Back

Question 1 of 27070

What is the direction of electron current through the load resistor in the circuit shown in the illustration? Illustration EL-0085

If the question has a related picture, it will appear here.