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2, (A) Sketch a circuit with a 10 V battery connected across a 20 Ω resistor. (B) Indicate the positive and negative poles of the battery. (C) Indicate the direction of positive current flow 3. How much current flows through your resistor in question (2)? 4. A certain wire has a resistance of 10 Q. (A) What is the resistance if twice as much length of wire is used instead? (B) What is the resistance if two such 10 Ω wires are placed side-by-side to conduct current? (Note that the cross sectional area has now increased). 5. If a silver wire has a resistance of 10.0 2 at 20.0 °C, what resistance does it have at 40.0 °C? (ag 3.8x10 C)

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