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# pq04ans - a Is – positive negative or zero(Circle the...

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PHYS-1200 PHYSICS II SPRING 2005 Post Quiz 4 Name____ ANSWERS _______________________ 1. A certain material carries 1.0 amp of current when the voltage across it is 2.0 V, 1.5 amp of current when the voltage across it is 3.0 V, and 2.5 amp of current when the voltage across it is 5.0 V. Is the material ohmic? (Circle the correct answer.) Yes No Cannot determine from the information given 2. Recall, ρ ρ 0 = ρ 0 α ( T T 0 ), where ρ 0 is the resistivity at T 0 = 293 K. You place a resistor in a cup of liquid nitrogen. When you do this, the resistance increases.
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Unformatted text preview: a) Is – positive, negative or zero? (Circle the correct answer.) Positive Negative Zero Not enough information b) Is T – T positive, negative or zero? (Circle the correct answer.) Positive Negative Zero Not enough information c) Is positive, negative or zero? (Circle the correct answer.) Positive Negative Zero Not enough information d) The resistor is made of what type of material? (Circle the correct answer.) Metal Semiconductor Insulator...
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