Midterm 1

Question 1

When a positive rod is brought to a neutral conductor, what happens to the charges inside the conductor?

Answer 1

Negative charges are attracted to the rod and positive are repelled

Question 2

Will distance traveled by electrons and protons be the same if all variables are constant and equal?

Answer 2

Yes

Question 3

What direction does an electric field above a sphere point if the charge is positive?

Answer 3

Away from the center

Question 4

In a conductor, where do charges reside?

Answer 4

On the surface

Question 5

What direction does electric field lines point?

Answer 5

Towards negative

Question 6

What is dielectric?

Answer 6

Tiny K

Question 7

How does distance impact voltages?

Answer 7

Small distance = greater voltage

Question 8

Can a conductor transfer charges to an insulator?

Answer 8

Yes

Question 9

How does a conductor reach electrostatic equilibrium?

Answer 9

Excess charges quickly redistribute themselves over the conductors surface

Question 10

How are charges transferred between objects?

Answer 10

Contact

Question 11

What is zero net charge?

Answer 11

Equal number of electrons and protons

Question 12

What does polarize mean?

Answer 12

Divide

Question 13

Is the polarization force between a neutral and charged object attractive or repulsive?

Answer 13

Attractive

Question 14

What is electric force?

Answer 14

Magnitude and direction between charges

Question 15

How do you calculate net electric force?

Answer 15

Find the sum of all the individual forces due to the charge

Question 16

How do you find the individual force from a charge?

Answer 16

Coulomb’s Law

Question 17

What creates an electric field?

Answer 17

Source charges

Question 18

What does the direction of an electric field depend on?

Answer 18

Source charges

Question 19

What direction does an electric field point?

Answer 19

Away from positive and towards negative

Question 20

Electric field 0: If magnitude is 4 times greater, how much greater does distance need to be?

Answer 20

2 times

Question 21

What is a parallel plate capacitor?

Answer 21

2 equally charged electrode conductors with opposite charges

Question 22

What is an electric dipole?

Answer 22

2 charges of equal magnitude but opposite charge

Question 23

What is the total charge of an electric dipole?

Answer 23

0

Question 24

What do closer electric field lines indicate?

Answer 24

Stronger electric field

Question 25

When is the electric field inside a conductor 0?

Answer 25

In electrostatic equilibrium

Question 26

Where do excess charges lie in a conductor?

Answer 26

The surface

Question 27

Where in a conductor is the electric field perpendicular?

Answer 27

The surface

Question 28

Does a sharp point of a conductor have a stronger or weaker electric field?

Answer 28

Stronger

Question 29

Do charges like to be close or far apart?

Answer 29

Far apart

Question 30

What is an electric dipole moment?

Answer 30

Vector the points from negative to positive charge of a dipole

Question 31

Does a dipole moment try to align itself with the electric field?

Answer 31

Yes

Question 32

Change in electric potential energy + change in kinetic energy = ?

Answer 32

0

Question 33

W = ?

Answer 33

Change in electric potential energy

Question 34

Are electric force and electric field scalar or vector quantities?

Answer 34

Vector

Question 35

Are electric potential energy and electric potential vector or scalar quantities?

Answer 35

Scalar

Question 36

How is a potential difference created?

Answer 36

By separating + charges from - charges

Question 37

Change in kinetic energy = ?

Answer 37

Negative change in electric potential energy AND negative q x change in potential energy

Question 38

Equipotential line/surfaces have the same _____ at every point

Answer 38

Potential energy

Question 39

Is the electric potential the same inside and outside of a sphere when r>R?

Answer 39

Yes

Question 39

Is the electric potential the same inside and outside of a sphere when r>R?

Answer 39

Yes

Question 40

Is the electric field at a point parallel or perpendicular to the equipotential surface at that point?

Answer 40

Perpendicular

Question 41

If change in kinetic energy increases, _____ decreases

Answer 41

Change in electric potential energy

Question 42

Electric field points from ____ potential to ______ potential

Answer 42

Higher, lower

Question 43

When do multiple conductors have the same potential energy?

Answer 43

When touching

Question 44

What does capacitance depend on?

Answer 44

Shape, size, and spacing of the 2 electrodes

Question 45

Does distance effect the electric field in a capacitor?

Answer 45

No

Question 46

What is C knot

Answer 46

Capacitance without any dielectric

Question 47

When capacitance increases, change in potential energy _____

Answer 47

Decreases

Question 48

What is current?

Answer 48

Flow rate of positive charge

Question 49

Does a charge gain or lose electric potential energy as it moves from the negative side of the battery to the positive?

Answer 49

Gain

Question 50

Junction Law

Answer 50

Sum of the currents in must equal sum of the currents out

Question 51

Loop Law

Answer 51

Net change of potential energy in any loop must be 0

Question 52

Is the potential difference across bulbs in parallel equal?

Answer 52

Yes

Question 53

Is the potential difference across bulbs in series equal?

Answer 53

No

Question 54

Is the current across bulbs in parallel equal?

Answer 54

No

Question 55

When is work positive?

Answer 55

When it's in the same direction as the displacement