If R = 4.0 k?, C = 3.0 mF, ? = 15 V, Q = 12 mC, and I = 2.0 mA, what is the potential difference Vb?Va?
A. +3.0 V
B. ?19 V
C. ?3.0 V
D. +27 V
E. +21 V
Answer: C
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A 2000 V/m electric field is directed along the +x-axis. If the potential at x = 10 m is 800 V, what is the potential at x = 6 m?
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Joe's toaster broke. He bought a toaster oven to replace it, telling his wife Annie that it is cheaper to make toast in the toaster oven than in the range's oven
Toast takes 5 minutes to cook in the toaster oven while it takes only 3 minutes in the range's oven. Is Joe right or is Annie, who says they've wasted their money? Explain.