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Chapter 3 - LEDs Quiz

Authored by Chin Siong Hong

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Professional Development

Used 2+ times

Chapter 3 - LEDs Quiz
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28 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does LED stand for in electronics?

Light Emitting Diode

Liquid Emission Device

Low Energy Display

Linear Electric Device

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a correct symbol for an LED?

A diode symbol with two arrows pointing away

A resistor symbol

A diode symbol with two arrows pointing inwards to the diode

A capacitor symbol

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At what current do LEDs typically begin to emit light?

0.5mA to 1.5mA

10mA to 20mA

30mA to 50mA

100mA to 200mA

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What is the relationship between forward current and light output in an LED?

Light output increases with forward current

Light output decreases with forward current

Light output is independent of current

Light output is maximum at zero current

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements is true about low-current LEDs?

They glow brightly with less current

They require more current to glow

They do not emit light

They are larger in size

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the effect of applying a voltage much above the typical level to an LED?

Too much current will flow and the LED will burn out

The LED will emit less light

The LED will become a resistor

The LED will start blinking

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of the arrows in the symbol of an LED?

They indicate light emission

They indicate current direction only

They indicate resistance

They indicate voltage drop

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