A fully charged parallel-plate capacitor remains connected to a battery while you slide a dielectric between the plates. What happens to the value of C?
1.It increases.
2.It decreases.
3.It stays the same.
1
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For an electron in the M (n = 3 ) shell,
find (a) the largest possible orbital angular momentum it can have, and (b) the smallest possible orbital angular momentum it can have. Express your answers in SI units, and for each case indicate the subshell (s, p, d, ...) of the electron. (h = 6.626 × 10-34 J ? s)
Transformers: The secondary coil of an ideal neon sign transformer provides 7500 V at 10.0 mA. The primary coil operates on 120 V. What current does the primary draw?
A. 0.625 A B. 0.625 mA C. 0.160 A D. 1.66 A
The most fundamental property of a star is its
A) luminosity. B) abundance of elements besides hydrogen and helium. C) mass. D) surface temperature. E) radius.
Consider a large molecular cloud that will give birth to a cluster of stars. Which of the following would you expect to be true?
A) A few massive stars will form, live, and die before the majority of the star's clusters even complete their protostar stage. B) All the stars in the cluster will be of about the same mass. C) All the stars in the cluster will become main-sequence stars at about the same time. D) All the stars in the cluster will have approximately the same luminosity and surface temperature.