A parallel-plate capacitor is connected to a battery. What happens to the stored energy if the plate separation is doubled while the capacitor remains connected to the battery?
1.It remains the same.
2.It is doubled.
3.It decreases by a factor of 2.
4.It decreases by a factor of 4.
5.It increases by a factor of 4.
Question 2
How is the direction of a magnetic field defined?