Question 470Electricity & Electronics - Assistant Engineer

70% to pass

The component labeled 'CR1' in the circuit shown in the illustration serves what functional purpose? Illustration EL-0085

Diagram for USCG Electrical Assistant: The component labeled 'CR1' in the circuit shown in the illustration serves...

Ait establishes a constant reference voltage for the base of 'Q1'

Bit acts as a low capacitive reactance to smooth ripple

Cit varies its anode/cathode polarity depending on 'RL' current

Dit rectifies the varying voltage from the collector of 'Q1'

AI Explanation

The correct answer is A) it establishes a constant reference voltage for the base of 'Q1'. In this circuit, the component labeled 'CR1' is likely a diode that serves as a voltage reference. Its purpose is to provide a stable, constant voltage to the base of transistor 'Q1', which allows 'Q1' to operate in a controlled, predictable manner as part of the circuit's overall functionality. The other answer choices are incorrect because: B) 'CR1' is not acting as a capacitor to smooth ripple, C) it is not varying its polarity based on current, and D) it is not rectifying the voltage from the collector of 'Q1'.

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