3 - CURRENT ELECTRICITY
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Practice Questions
Test your understanding with targeted questions
What is the formula to calculate electric current?
💡 Hint: Think about how charge changes over time.
Define voltage.
💡 Hint: Consider what drives the current through a circuit.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does Ohm's Law state?
💡 Hint: Focus on rearranging the terms correctly.
True or false: Higher resistance results in lower current, when voltage is constant.
💡 Hint: Consider how V and R interact in the evidence.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A circuit has a voltage of 24V and consists of four resistors in series with total resistance of 12Ω. Calculate the current flowing in the circuit.
💡 Hint: Review how series resistance works to solve for total current.
In a copper wire, the average drift speed of conduction electrons is calculated to be 1.1mm/s. If there are 8.5 x 10^28 free electrons per cubic meter, find the current in a cross-sectional area of 1.0 x 10^-6 m².
💡 Hint: Break down the components and substitute into the current density formula.
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