Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What component is used to switch a relay using a microcontroller?
💡 Hint: Think about what can amplify current.
Question 2
Easy
Why do we use a diode with a relay?
💡 Hint: What happens when you suddenly cut off current from a coil?
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the primary function of a freewheeling diode in a relay circuit?
- To increase current
- To provide an alternative path for current
- To decrease voltage
💡 Hint: Consider what happens when you turn off an inductive load.
Question 2
True or False: A microcontroller can directly drive an electromechanical relay without additional components.
- True
- False
💡 Hint: Think about the current ratings of microcontrollers vs. relays.
Solve 3 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Design a simple circuit schematic that includes a microcontroller, transistor, relay, and diode. Describe how you would wire them to ensure safe operation.
💡 Hint: Consider the direction of current flow for each component.
Question 2
If a relay operates at 12V and requires 50mA of current, what is the required resistance value for the current-limiting resistor connected to the base of the transistor to achieve this?
💡 Hint: Review how to calculate resistance based on applied voltage and desired current.
Challenge and get performance evaluation