A positively charged rod is brought close to an uncharged electroscope. While the rod is close, one's finger touches the far side of the metal ball on the electroscope. The finger is removed and then the rod is taken away. The electroscope is
A. uncharged.
B. positively charged.
C. negatively charged.
Answer: C
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When the ______________ is crossed traveling westward, the date is advanced to the next day
Fill in the blank(s) with correct word
Two parallel conducting plates are separated by 1.0 mm and carry equal but opposite surface charge densities. If the potential difference between them is 2.0 V,
what is the magnitude of the surface charge density on each plate? (?0 = 8.85 × 10-12 C2/N ? m2) A) 18 nC/m2 B) 0.13 mC/m2 C) 35 nC/m2 D) 0.27 mC/m2
Two point charges are separated by 10.0 cm and have charges of +1.00 µC and -1.00 µC, respectively. What is the electric field at a point midway between the two charges? (ke = 8.99 × 10^9 N•m2/C2)
a. 14.4 × 10^6 N/C c. 28.8 × 10^6 N/C b. zero d. 7.19 × 10^6 N/C
The two main theories of 20th century physics are
A) relativity and quantum theory. B) relativity and Newtonian mechanics. C) quantum theory and electromagnetism. D) relativity and electromagnetism. E) electromagnetism and thermodynamics.