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1)You have a circuit consisting of four 4
1)You have a circuit consisting of four 4.5 V D-cell batteries in series, some wires, and a light bulb. The bulb is lit and the current flowing through the bulb is 0.50 A. You may assume that all of the voltage drop occurs in the light bulb. What is the resistance of the bulb? 2. a) Which direction (clockwise or counterclockwise) does conventional current travel through the wire in the figure to the right? Explain. Light Bulb b) At which point (a or b) will an electron feel more electric potential? Explain. At which point (a or b) will an electron have more electric potential energy? Explain. c) . a) A 60 W light bulb is plugged into a standard 120 V outlet. How much does it cost per 30-day month to leave the light turned on continuously? Assume electrical energ costs $0.12/kW-hr. b) What is the current through the bulb? c) What is the resistance of the bulb? The power rating on a light bulb indicates how much power it would dissipate when it is direction (clockwise or counterclockwise) does conventional current travel through the wire in the figure to the right? Explain.
b) At which point (a or b) will an electron feel more electric potential? Explain.
c) At which point (a or b) will an electron have more electric potential energy? Explain.
Expert Solution
a) Which direction (clockwise or counterclockwise) does conventional current travel through the wire in the figure to the right? Explain.
Answer: The direction is counterclockwise. This is so because electrons in the circuit always travel from negative potential to the positive potential and the conventional current direction is opposite to the direction of travel of electrons.
b) At which point (a or b) will an electron feel more electric potential? Explain.
Answer: At point b. This is obvious, point b is at a higher potential than point a. That is, point b is near the positive end of the battery and point a is near the negative end.
c) At which point (a or b) will an electron have more electric potential energy? Explain.
Answer: At point b. Electric potential energy is, U = q V. Though both points a and b are at equal distances from the battery, b is more positive relative to a.
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