What is the name of the component indicated by the arrow?

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Question: What is the name of the component indicated by the arrow? 
Options: 1) Suppressor diode 2) LED 3) Triac 4) Triode

Beginning the analysis, I first consider the symbol shown by the arrow. The component is drawn as a diode symbol oriented across a DC motor, connected in parallel with the motor windings. This placement is characteristic of a flyback or freewheeling protection diode used to clamp voltage spikes when the motor is switched off.

Option 1: Suppressor diode. This term is commonly used to describe a diode placed across inductive loads (like motors or solenoids) to suppress the voltage spike due to back-EMF. The diode symbol and its protective role align with this option. This is the most accurate description of the component in the circuit.

Option 2: LED. An LED is a light-emitting diode with a diode symbol but requires a forward current-limiting resistor and is not typically placed across a motor for back-EMF suppression. In the diagram, there is no indication of light emission or current-limiting conditions associated with an LED, so this is unlikely.

Option 3: Triac. A triac is a bidirectional thyristor used to control AC power, typically drawn with three terminals and not used as a simple diode across a motor in a DC circuit. The symbol in the figure does not resemble a triac.

Option 4: Triode. A triode is a vacuum-tube tube with three electrodes, not a semiconductor diode symbol, and it would not be used in this solid-state circuit configuration. The symbol here clearly depicts a diode, not a triode.

In summary, the component shown in the image is the flyback/suppressor diode placed across the motor to protect the circuit from back-EMF spikes. The remaining options do not fit the symbol, placement, or function depicted in the schematic.

VANT_V 151 VE1 2025SS Wk3 Electronics quiz

What is the name of the component indicated by the arrow?

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