Question

A capacitor has plates with area A = 0.040 m^2, separation d = 1.6 mm, with a piece of material in between.   Its capacitance is 5.0 x 10^-10 F.   What is the dielectric constant of the material K = ?

Question options:

	2.2
	2.6
	2.0
	3.0
	2.3

Question

What is electric potential, which is also referred to as voltage?

Question options:

	work per unit charge
	work time the charge
	magnitude of the electric field
	magnitude of the electric force
	none of these

Question

A 6.0 nC charge is 8.0 cm away from a -9.0 nC charge. What is the force of attraction between them?

Question options:

	32 micro N
	96 micro N
	64 micro N
	1.0x10^2 micro N
	76 micro N

Question

A thin lens has a focal length f = 1.0 x 10^2 cm. In order to ensure that the image is the same size as the object, where should the object be placed? That is, what is the object distance s?

Question options:

	1.0x10^2 cm
	2.0x10^2 cm
	3.4x10^2 cm
	50. cm
	4.0x10^2 cm

Answer 1

Answer! A= 0.040 m d = 16mm yo C-5.0 x 10 el Aco = k Co d 5x1610 - KX 0.040 X885x16/2 16 x 10 k = 2.2 work per ano't change * 10 = W QU (3.) = fionc Va angionc -9 = 81 X 6 X 10 I= k a a a : 76 M N 82 64 x 104 fa 5 (4.) fa loom rens and ch -4 » Object should be placed at 27. = 0=27= 2X 1072 oncm