The circuit below contains three 100-W light bulbs and a capacitor. The emf is 110 V and the capacitor is fully charged. Which light bulb(s) is(are) brightest?

A. A
B. B
C. C
D. A and B
E. A and C


Answer: B

Physics & Space Science

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The human eye is sensitive to light with wavelength down to 710 nm. What is the frequency of radiation at this wavelength? (1 nm = 10?9 m and c = 3.00 × 10^8 m/s)

a. 4.23E+5 Hz b. 4.42E+6 Hz c. 4.23E+14 Hz d. 4.37E+7 Hz e. 2.18E+7 Hz

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