Grade 11 Physics: Electrical Resistance
This worksheet covers fundamental concepts of electrical resistance for Grade 11 Physics students, including Ohm's Law, factors affecting resistance, and series/parallel circuits.
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Electrical Resistance Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. Which of the following statements correctly defines electrical resistance?
The flow of electrons through a conductor.
The opposition to the flow of electric current.
The rate at which electric charge passes a point.
The potential difference between two points.
2. According to Ohm's Law, if the voltage across a resistor is doubled, what happens to the current (assuming resistance remains constant)?
The current is halved.
The current remains the same.
The current is doubled.
The current is quadrupled.
3. The unit of electrical resistance is the .
4. The resistance of a wire increases with its and its .
5. A material that offers very little resistance to the flow of current is called a .
6. State Ohm's Law and write its mathematical formula.
7. Explain why a longer wire has more resistance than a shorter wire of the same material and thickness.
8. Consider the simple circuit below. If the voltage source is 12 V and the resistor has a resistance of 4 Ω, calculate the current flowing through the circuit.
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