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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define EMF.
๐ก Hint: What does EMF stand for?
Question 2
Easy
What is internal resistance?
๐ก 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
๐ก 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
๐ก 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 4ฮฉ. If the circuit draws 5A, calculate the terminal voltage and the efficiency of the cell in delivering power.
๐ก 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 1ฮฉ internal resistance, is used to power a 10ฮฉ resistor. Calculate the total current flowing through the circuit.
๐ก Hint: Remember to use the equivalent resistance for parallel combinations!
Challenge and get performance evaluation