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NCAT Practice Test - Practice Test - Physics - Current Electricity Quiz

Attempt 10 MCQs on NCAT Practice Test - Practice Test - Physics - Current Electricity | Quiz 2

11. What is the formula for temperature coefficient of resistance?



12. What is internal resistance?



13. What is the formula for terminal voltage of a cell?



14. How does terminal voltage compare to emf when a cell supplies current?



15. What is the condition for maximum power transfer?



16. What is the maximum power that can be delivered by a cell of emf E and internal resistance r?



17. If length of a wire is doubled, resistance becomes:



18. If cross-sectional area of a wire is doubled, resistance becomes:



19. Calculate resistance of copper wire: length 2 m, area 1 mm², ρ=1.6×10⁻⁸ Ω·m.



20. Which of the following does NOT obey Ohm's law?



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