midterm 2

Question 1

volts

Answer 1

J/C
voltage=electrical potential

Question 2

kinetic energy and energy theorem

Answer 2

KE1+EPE1=KE2+EPE2

Question 3

work and difference in electrical potential energy

+ what is work also equal to

Answer 3

EPE1-EPE2=W

W=F(x)

= (kqq0/ra)-(kqq0/rb)

Question 4

positive charge vs negative charges and potential

Answer 4

positive: go from high electrical potential to low electrical potential

negative: low electrical potential to high electrical potential

Question 5

electrical force

Answer 5

F=W/x

Question 6

electrical field

Answer 6

E (curve E)=F/q

Question 7

potential of a point charge

Answer 7

V=kq/r

Question 8

number of places where V=0V

Answer 8

*in between two charges
* to the right of the smaller charge (magnitude)

Question 9

In finding acceleration

Answer 9

F=ma
F=qE

Question 10

dielectric

Answer 10

filling a region between plates with electrically insulating subsance

*has a K (curly) constant

Question 11

SI unit of Capacitance

Answer 11

C/V=F

Question 12

E

Answer 12

-diff in voltage/diff in x

Question 13

conventional current

Answer 13

hypothetical flow of positive charges that would have the same effect than the movement of negative charge

Question 14

delta q

Answer 14

amount of charge that flows into the circuit

Question 15

energy=

Answer 15

charge (energy/charge)..therefore

E=q(V)

E=V^2/R

Question 16

electromotive force

Answer 16

is the maximum potential difference between terminals in a battery

Question 17

equation to determine number of electron

Answer 17

1) I=delta q/ delta t
2) N=q/E

Question 18

relating power to resistance and intensity

Answer 18

P=I^2R

Question 19

energy Is equal to what equation

Answer 19

energy=Pt

Question 20

when is electrical field vs potential 0

Answer 20

The electric field is zero where the electric potential doesn’t change

electric potential is zero at certain points or far away from charges.

Question 21

what is true regarding the work done by an external force in moving an electron at constant speed between two points in an electrostatic field?

Answer 21

the work done depends on the displacement of the electron

Question 22

why is it possible to define an electrostatic potential in a region of space that contains an electrostatic field

Answer 22

the work required to bring 2 charges together is independent of the path taken

Question 23

what is false regarding electrostatic situations

Answer 23

n force component acts along the path of a charge as it is moved along an equipotential surface

Question 24

which of the following statements best describes the equipotential surfaces surrounding a point charge

Answer 24

the equipotential surfaces are concentric spheres with the charge at the centre

Question 25

Complete the following statement: The electromotive force is

Answer 25

the maximum potential difference between the terminals of a battery.

Question 26

ohm

Answer 26

J(s)/C^2

Question 27

the square question

Answer 27

electric field = 0 (think fail=0) - bc the directions of the fields cancel electric potential : V=4kQ/a - bc it occurs for the same charge you just sum up kQ/a for times, ignoring the diagonal measure, because the radius would be 2a/2=a

Question 28

- the lines for positive vs negative

Answer 28

positive- move outward negative- move inward