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PHYS 219 Recitation Quiz

This quiz covers fundamental concepts in physics related to electrical resistance, charge, and energy storage in capacitors. Questions include calculating the resistivity of a wire with a certain resistance, evaluating the total charge and work done by a battery over a specific time while supplying current, and determining the energy stored in a parallel-plate capacitor after inserting a dielectric. Each question provides multiple-choice answers for students to identify the correct solutions, reinforcing their understanding of electrical principles.

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PHYS 219 Recitation Quiz

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  1. PHYS 219 Recitation Quiz Kevin Ralphs Week 3

  2. Quiz Question 1 A wire has a diameter of 1.0 mm and a length of 30 m, and is found to have a resistance of 1.2 Ω. What is the resistivity of the wire? • 31.4 nΩ∙m • 126 nΩ∙m • 115 MΩ∙m • 45.8 MΩ∙m

  3. Quiz Question 2 A 14.4-V battery for a cordless drill can supply 2.0 A of current. If the drill is continuously operated for 5 min, what is the total charge passing through the battery? What total amount of work does the battery do on the charge during these 5 min? • 600 C; 8.64 kJ • 10 C; 144 J • 600C; 144 J • 10 C; 8.64 kJ

  4. Quiz Question 3 A parallel-plate capacitor with an area of 1.0 cm2 and a plate spacing of 0.20 mm is charged until a potential difference of 10 V is across the plates. It is then disconnected so that the charge cannot change. If a dielectric with is inserted between the plates, what is the energy stored in the capacitor? • 442 nJ • 44.2 pJ • 2.21 μJ • 221 pJ

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