Automatic Street Light and RC Car Circuit Worksheet

The primary component in your automatic street light circuit that senses the presence of light is:

• LED

• Transistor

• Photoresistor (LDR)

• Capacitor

What happens to the electrical resistance of an LDR when the surroundings get brighter?

• It stays the same.

• It increases significantly.

• It decreases significantly.

• It increases then decreases.

In the context of the street light circuit, the signal from the LDR read by the microcontroller is typically a(n):

• Digital signal (only HIGH or LOW)

• Binary signal (only 1 or 0)

• Analog signal (a continuous range of values)

• A pulse-width modulation (PWM) signal

The function of the motor driver in an RC car circuit is to:

• Receive signals from the remote controller.

• Provide power to the microcontroller.

• Increase the low-current signal from the microcontroller to power the motors.

• Measure the speed of the wheels.

What does the acronym PWM stand for in the context of controlling an RC car's motor speed?

• Programmed Wire Management

• Power Wattage Module

• Pulse Width Modulation

• Peripheral Wireless Monitor

Which programming structure allows an RC car to drive continuously until an obstacle is detected?

• An if-else statement

• A for loop

• A switch statement

• A while loop

What is the correct definition of a logic error in a program?

• An error that stops the program from compiling.

• An error that causes the program to crash while executing.

• An error where the program runs but produces an incorrect or unintended result.

• An error caused by a hardware failure.

In programming, a variable is primarily used to:

• Draw graphics on the screen.

• Control the flow of a loop.

• Store a piece of data or information.

Define a mathematical function.

• A mathematical function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output.

• A mathematical function is a process that always produces multiple outputs for each input.

• A mathematical function is a random assignment of outputs to inputs with no specific rule.

• A mathematical function is a relation where each output is related to multiple inputs in any way.

If an RC car function is named turn_right(), this block of reusable code is called a(n):

• Variable

• Loop

• Statement

• Function (or method)