Free electronics foundations check

Check your maker electronics foundations.

Review circuits, voltage, current, resistance, components, breadboards, measurement, microcontrollers, and safer prototyping. You will receive an indicative ME1-ME4 result.

7 min: Typical time
12: Questions
ME1-ME4: Level range

Question 1 of 12 0 answered

1 Circuits

What is required for steady current to flow through a simple circuit?

A A closed conducting path and a potential difference B An open switch only C A disconnected battery D Plastic between every component

2 Voltage

What does voltage describe?

A Electric potential difference B The amount of stored computer files C Only wire length D The color of a resistor

3 Current

What is electric current?

A Rate of flow of electric charge B Resistance to all motion C Stored light D The mass of a battery

4 Resistance

What is a common purpose of a resistor?

A Limit current or create a voltage relationship B Generate unlimited power C Store program code D Act as a mechanical switch only

5 LEDs

Why is a series resistor commonly used with an LED?

A To limit current and protect the LED B To reverse gravity C To make polarity irrelevant D To store images

6 Measurement

How is a voltmeter connected to measure voltage across a component?

A In parallel across the two points B In series by cutting every wire C Only to ground with one lead D Inside the battery case

7 Breadboards

What is a solderless breadboard for?

A Temporary circuit prototyping with connected contact groups B Permanent high-voltage installation C Cutting circuit boards D Measuring temperature only

8 Ohms law

A 6 V source is across a 300 ohm resistor. What current flows ideally?

A 0.002 A B 0.02 A C 2 A D 50 A

9 Series circuits

In a simple series circuit, what is the same through each component?

A Current B Voltage drop C Resistance D Power in every case

10 Parallel circuits

In parallel branches connected to the same two nodes, what is shared?

A Voltage across each branch B Current through every branch regardless of resistance C Component temperature D Wire color

11 Microcontrollers

What is a microcontroller?

A A small programmable device combining a processor, memory, and input/output peripherals B A mechanical resistor C A power outlet D A display cable only

12 Safety

What should you do before changing a prototype circuit?

A Remove power and verify the intended connections B Short the supply terminals C Touch exposed mains wiring D Increase voltage without checking ratings

Before you begin

Use your own knowledge.

Choose one answer for every question.
Do not use calculators, compilers, search, or reference tools.
There is no timer, so read naturally.
You can retake the test as your skills improve.

This is an indicative self-assessment, not an accredited certificate or formal examination. It samples selected foundations and cannot measure every part of the subject.