Homework # 22 - Resistance 4. Handout Problems: 1. Explain in terms of electron motion and collision why (a) longer wires have more resistance; (b) wires. 7' with greater cross sectional area [thicker] have less resistance and (c) heating a wire increases its resistance. ' ' 2. What happens to the electrical energy furnished by a battery to move a current through a resistor? 3. What is the resistance of a metal conductor through which a 6.0V battery sends a current of 0.20 A? 4. A current of 0.40 A is flowing in a nichrome wire of resistance 25 Q. What potential difference is being applied to the wire? 5. A liOV electric iron draws 3.0 A of current. How much electrical energy is supplied to it each hour? 6. What is the resistance of a Tungsten wire of cross sectional area, 0002 m2, length 10 m, at a temperature of 20C? [See reference table] ________________________