A parallel-plate capacitor is charged and then is disconnected ...

[PhilipSeeMore]

A parallel-plate capacitor is charged and then is disconnected from the battery. By what factor does the stored energy change when the plate separation is then doubled?
  1.It becomes four times larger.
  2.It becomes two times larger.
  3.It stays the same.
  4.It becomes one-half as large.
  5.It becomes one-fourth as large.

Question 2

What is the polarity (north or south) of Earth's magnetic pole which is located near Earth's north geographic pole? Explain.

[kaylee05]

Answer to Question 1

2

Answer to Question 2

Near Earth's north geographic pole is a south magnetic pole. A compass needle
aligns its long axis with Earth's magnetic field. The north-seeking pole is called the
north pole of the magnet. Because unlike poles attract, the magnetic pole near Earth's
geographic pole therefore must be a south magnetic pole.

[PhilipSeeMore]

Excellent

[xiaomengxian]

TYSM