Light dimmer circuit in Power Electronics - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the main component used to control brightness in a light dimmer circuit.

Power Electronics

The main component used in a light dimmer circuit is a [1].

Drag options to blanks, or click blank then click option'

Aresistor

Btransformer

Ccapacitor

Dtriac

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the triac with a resistor or capacitor.

Thinking a transformer controls brightness directly.

The triac is the key component that controls the power delivered to the light bulb, adjusting its brightness.

2fill in blank

medium

Complete the code to describe the function of the diac in a light dimmer circuit.

Power Electronics

The diac in a light dimmer circuit is used to [1] the triac.

Drag options to blanks, or click blank then click option'

Atrigger

Bpower

Cfilter

Dcool

Attempts:

3 left

💡 Hint

Common Mistakes

Thinking the diac powers the triac directly.

Confusing the diac with a cooling device.

The diac provides a sharp trigger pulse to the triac, helping it switch on at the right time.

3fill in blank

hard

Fix the error in the description of how the light dimmer controls brightness.

Power Electronics

The brightness is controlled by adjusting the [1] angle of the AC waveform.

Drag options to blanks, or click blank then click option'

Afrequency

Bphase

Camplitude

Dwavelength

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing phase angle with frequency or amplitude.

Thinking wavelength affects brightness directly.

Brightness is controlled by changing the phase angle at which the triac triggers, controlling how much of the AC waveform reaches the bulb.

4fill in blank

hard

Fill both blanks to complete the explanation of the role of the potentiometer and capacitor in the dimmer circuit.

Power Electronics

The potentiometer adjusts the [1] of the trigger pulse, while the capacitor controls the [2] of the pulse.

Drag options to blanks, or click blank then click option'

Atiming

Bfrequency

Cshape

Dvoltage

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up frequency and timing.

Thinking voltage is adjusted by the capacitor here.

The potentiometer changes the timing of when the triac triggers, and the capacitor affects the shape of the trigger pulse to ensure proper firing.

5fill in blank

hard

Fill all three blanks to complete the dictionary that maps component names to their functions in a light dimmer circuit.

Power Electronics

component_functions = {{'{'}}[1]: 'Controls power flow', [2]: 'Provides trigger pulse', [3]: 'Adjusts trigger timing'{{'}'}}

Drag options to blanks, or click blank then click option'

A'triac'

B'diac'

C'potentiometer'

D'capacitor'

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the roles of capacitor and potentiometer.

Mixing up diac and triac functions.

The triac controls power flow, the diac provides the trigger pulse, and the potentiometer adjusts the trigger timing in a light dimmer circuit.