Question

1)A parallel plate capacitor (denoted as Capacitor 1) has a plate area A₁ and a separation distance d₁. It is filled with a dielectric made of mylar (κ=3.1). With these conditions, it has a capacitance C₁. A second parallel plate capacitor (denoted as Capacitor 2) has the same plate area as the first capacitor (A₁ = A₂) but the separation distance is twice as large (d₁ = ½ d₂). The second capacitor is filled with the same dielectric (mylar) and it also completely fills the gap between the plates giving this capacitor a capacitance of C₂. What is the ratio C₁ /C₂ ?

	A.	1.4
	B.	4.0
	C.	5.7
	D.	2.0
	E.	7.0

2)You have a parallel plate capacitor with a charge Q stored on one of the plates due to the capacitor being connected to a battery whose voltage is V. If one could double this voltage, the magnitude of the charge that would be stored would change as described by which of the following?

	A.	The magnitude of the charge on one plate would stay the same
	B.	The magnitude of the charge on one plate would triple
	C.	The magnitude of the charge on one plate would increase by a factor of 4
	D.	The magnitude of the charge on one plate would be halved
	E.	The magnitude of the charge on one plate would double

Answer 1