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
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define EMF.
💡 Hint: What does EMF stand for?
Question 2
Easy
What is internal resistance?
💡 Hint: Think about what happens inside a battery.
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 does EMF stand for?
- Electromagnetic Force
- Electromotive Force
- Electrostatic Force
💡 Hint: Think about what 'EMF' represents in electrical circuits.
Question 2
True or False: Internal resistance increases the terminal voltage of a battery.
- True
- False
💡 Hint: Consider what happens to voltage when resistance is involved.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A cell has an EMF of 20V and an internal resistance of 4Ω. If the circuit draws 5A, calculate the terminal voltage and the efficiency of the cell in delivering power.
💡 Hint: Efficiency is power output over power input; consider replacing the battery for better outcomes.
Question 2
A circuit with two batteries in parallel, each with 9V EMF and 1Ω internal resistance, is used to power a 10Ω resistor. Calculate the total current flowing through the circuit.
💡 Hint: Remember to use the equivalent resistance for parallel combinations!
Challenge and get performance evaluation