Grade 9 Summative Test

How are the holes in the main section of a breadboard connected?

• Vertically in columns

• Horizontally in rows

• Both vertically and horizontally

• Randomly, with no specific pattern

What is the primary purpose of the central groove on a breadboard?

• To provide a space for integrated chips without connecting their pins

• To separate the positive and negative power rails

• To allow for easier wire insertion

• To indicate the center point of the board

How are the holes in the power rails of a breadboard typically connected?

• Vertically in columns

• Horizontally in rows

• Both vertically and horizontally

• They are not connected to each other

What is a significant advantage of using a breadboard?

• It allows for permanent circuit connections

• It eliminates the need for a power source

• It simplifies circuit assembly by not requiring soldering

• It makes circuits waterproof

What should be considered when connecting an LED?

• Both legs must be the same length

• The long leg connects to the negative terminal

• LEDs are one-way streets; leg lengths indicate polarity

• The color determines leg polarity

What do the red and blue lines on a breadboard indicate?

• LED placement

• Positive and negative power rails

• Resistor connections

• Circuit sections

Why use different colored wires on a breadboard?

• Different current levels

• Different component types

• To organize the circuit

• Different voltage levels

How can an LED be powered with a coin cell battery without a holder?

• Tape the battery to the LED

• Connect it to the breadboard power rails

• Pinch it between wires

• Insert it into breadboard holes

Why include a resistor in an LED circuit?

• To make the LED brighter

• To increase voltage

• To protect from excess current

• To change color

What happens to LED brightness with a resistor?

• Brighter

• Dimmer

• Color changes

• No change