Practice - EMF and Internal Resistance
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Practice Questions
Test your understanding with targeted questions
Define EMF.
💡 Hint: What does EMF stand for?
What is internal resistance?
💡 Hint: Think about what happens inside a battery.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does EMF stand for?
💡 Hint: Think about what 'EMF' represents in electrical circuits.
True or False: Internal resistance increases the terminal voltage of a battery.
💡 Hint: Consider what happens to voltage when resistance is involved.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
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.
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!
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