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Unformatted text preview: CalBased Physics Opportunity III Spring, 2010 Each short answer is worth two points. As one skydiver told another, happy landings! 1. According to Ohm’s Law for metals, the current density is directly proportional to a) the length of the wire b) the resistivity c) the applied electric field 2. a) An ammeter should be wired in _____ with the circuit element of interest. b) A voltmeter should be wired in _____ with the circuit element of interest. 3. A nonconducting material between the plates of a capacitor is called an insulator or a(n) ______________ . 4. T/F: Kirchhoff’s junction rule states that the sum of potential differences at a junction is zero. 5. The headlights of a car are wired in ________ . 6. T/F: The electromotive force is measured in Newtons. 7. Is current ever “used up” in a resistor? 8. Three 2.0 Ω resistors are connected across the sides of an equilateral triangle. The equivalent resistance between any two corners of the triangle is ____ Ω . a) 2.0 b) 6.0 b) 6....
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 Spring '11
 LarryDavid
 Electric charge, Vab, circuit element, qo, 3.0 W, junction rule states

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