SKF2 LED

Which of the statements below describe about input.

(i) Element that sets a digital system in action.

(ii) Results from the system.

(iii) Sensors, communication modules, external storage and etc.

(iv) Lights, sound, actuators, communication module and display.

• i and ii

• i and iii

• ii and iii

• All above

Which of the statements below describe about OUTPUT.

(i) Element that sets a digital system in action.

(ii) Results from the system.

(iii) Sensors, communication modules, external storage and etc.

(iv) Lights, sound, actuators, communication module and display.

• i and ii

• i and iii

• ii and iv

• All above

What does LED stand for?

• Light Emitting Diode

• Luminous Electric Device

• Light Emitting Device

• Luminous Energy Diode

Figure show an electronic component that emit the light.

Which types of electric lighting produce by the component?

• Gas-discharge lamps

• Light-emitting diodes

• Fluorescent lights

• Incandescent light bulbs

What is the direction of current flow in an LED?

• From cathode to anode

• From anode to cathode

• In both directions

• From positive to negative

What is the application of LED?

• Store the data

• Create a sound

• Give signal or indication

• Provide heat

Which is advantage of LED over incandescent light.

• Big size

• Short lifetime

• Large energy consumption

• Faster switching

Which of the statement shown describes about LED?

(i) LED is a p–n junction diode.

(ii) LED is always used as output device in digital system.

(iii) High energy consumption.

• i and ii

• i and iii

• ii and iii

• All above

Based on picture shown, terminal + (positive) also known as

• Based

• Cathode

• Emitter

• Anode

Based on picture shown, terminal - (negative) also known as

• Collecter

• Cathode

• Emitter

• Anode