Grade 5-9

1. What does RGB stand for in an RGB LED?

• a) Red-Gold-Blue

• b) Red-Green-Black

• c) Red-Green-Blue

• d) Right-Gain-Base

2. What color will be produced if Red and Green LEDs are both on in an RGB LED?

• a)Yellow

• b)Cyan

• c)Magenta

• d)White

3.How many terminals does the RGB LED have?

• A) 1

• B) 2

• c) 3

• D) 4

4.. Which leg of the LED is usually longer?

• a) Negative

• b) Positive

• c) Ground

• d) None of the above

5.What happens to an LED if its terminals are reversed?

• a)Glow brighter

• b)Glow dimmer

• c)Not Glow

• d)LED will burn

6.LED is related to these. Which one is the odd one out?

• a)Emits light

• b)Diode

• c)Semiconductor

• d)Produces sound

7. 7. what are the materials that allows electricity to pass through it.

• A) Metals

• B) Wet Wood

• c) Sea Water

• D) All the Above

8. If a wire is cut between a battery and an LED so that electricity can’t flow, what is this

situation called?

• a) Closed circuit

• b) Open circuit

• c) Short circuit

• d) All the above

9. Which device is used to make a propeller rotate?

• A) LED

• B) DC Motor

• C) Buzzer

• D) Bulb

10.What will happened if we reverse the DC motor terminals?

• A) Rotates Fast

• B) Stops rotates

• C) It rotates reverse

• D) Nothing will happen