(1) How many electrons are contained in a -1 C of charge? A. 5.4 × 10^15 electrons B. 5.4 × 10^18 electrons C. 6.2 × 10^15 electrons D. 6.2 × 10^18 electrons E. None of the Above
(1) How many electrons are contained in a -1 C of charge?
A. 5.4 × 10^15 electrons
B. 5.4 × 10^18 electrons
C. 6.2 × 10^15 electrons
D. 6.2 × 10^18 electrons
E. None of the Above
(2) What is the total mass of the electrons in question 1? Me= 9.11 × 10^-31 kg
A. 5.6 × 10^−12 kg
B. 5.6 × 10^−15 kg
C. 3.7 × 10^−12 kg
D. 3.7 × 10^−15 kg
E. None of the Above
(3) If two equal charges, each of 1 C, were separated in air by a distance of 1 km, what would be the force between them? k = 9.0 × 10^9 Nm^2/C^2
A. 9.0 mN
B. 9.0 kN
C. 9.0 MN
D. 9.0 GN
E. None of the Above
(4) Two point charges, Q1 and Q2, are 3 m apart, and their combined charge is 20 µC. If one repels the other with a force of 0.075 N, what are the magnitudes of the two charges?
A. 8 µC and 12 µC
B. 10 µC and 10 µC
C. 15 µC and 5 µC
D. 18 µC and 2 µC
E. None of the Above
(5) From question 4, if one attracts the other with a force of 0.525 N, what are the magnitudes of the charges? Choose two answers.
A. 15 µC and -35 µC
B. -15 µC and 35 µC
C. 40 µC and -20 µC
D. -40 µC and 20 µC
E. None of the Above
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