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practice_final

# practice_final - Name Class Date ID A w9final Multiple...

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Name: ______________________ Class: _________________ Date: _________ ID: A 1 w9final Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. If C = 36 μ F, determine the equivalent capacitance for the combination shown. a. 24 μ F b. 28 μ F c. 36 μ F d. 32 μ F e. 20 μ F ____ 2. What is the potential difference between points a and b? ____ 3. Consider two charged spheres, one with charge +2 C and the other with 2 C. A proton (a positively charged particle) is at the point halfway between the spheres. What is not zero?

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Name: ______________________ ID: A 2 ____ 4. A solid conducting sphere of 10 cm radius has a net charge of 20 nC. If the potential at infinity is taken as zero, what is the potential at the center of the sphere? ____ 5. An initially uncharged hollow metallic sphere with radius of 5 cm has a small object with a charge of +10 μ C carefully placed at the center of the sphere through a hole in the latter's surface. With the charge in place, what charge is now present on the outside surface of the sphere? a. +10 μ C b. +4 000 μ C c. zero d. 10 μ C e. 4000 μ C ____ 6. A proton moving at 3.0 × 10 4 m/s is projected at an angle of 30 ° above a horizontal plane. If an electric field of 400 N/C is acting down, how long does it take the proton to return to the horizontal plane? (Hint: Ignore gravity. m proton = 1.67 × 10 27 kg, q proton = 1.6 × 10 19 C) a. 1.7 × 10 6 s b. 7.8 × 10 7 s c. 1.0 × 10 5 s d. 3.9 × 10 6 s e. 7.8 × 10 6 s ____
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practice_final - Name Class Date ID A w9final Multiple...

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