Lab Final

Question 1

d(PV)=0
dT=0
dE=0

Answer 1

The PV=constant implies that

Question 2

the momentum exchange from collisions b/w molecules as a function of temp

The force exerted by collisions b/w molecules and the walls where the gas is contains

how fast gas molecules move and collide under different temps

Answer 2

The ideal gas law

Question 3

The term P*V in ideal gas law has units of

Answer 3

Joule

Question 4

An adiabatic process exchanges

Answer 4

zero heat with the environment

Question 5

Joule’s law describes

Answer 5

the relationships b/w power of the source providing the heat, time, and temperature

Question 6

the specific hear of two different liquids at the same temperature and pressure are

Answer 6

likely different

Question 7

Two beakers contain two liquids of the same mass. We heat them up to the same final temperature, w/o any phase changes occurring. The liquid that overall heats up faster has

Answer 7

smaller specific heat than the other

Question 8

Heat is a form of energy that relates to the

Answer 8

energy flow from hot to cold

Question 9

When a body of water is evaporating then its temperature is

Answer 9

dropping

Question 10

A very fast gas decompression under a constant volume results in a sudden temperature

Answer 10

drop

Question 11

The inductive charging acquires the opposite charge than the main Van de Graaf dome is because

Answer 11

The repelling forces between electrons

Question 12

The charges on a randomly-shaped conductor always reside

Answer 12

at the surface

Question 13

There are free electrons in the air we breath T/F

Answer 13

true

Question 14

The reason air “breaks down”

Answer 14

Electrons accelerate and knock off orbiting electrons thus creating ions

Question 15

One argues that because the proton is much larger in mass than the electron, it creates a much stronger electric field at the same distance than the electron does. T/F

Answer 15

False

Question 16

A student argues that the sound that is produced during VDG spark is due to the thermal expansion of the surrounding air. T/F

Answer 16

True

Question 17

The size of the VDG dome determines

Answer 17

How much charge is stored, how long the sparks can reach, the electric potential magnitude on the surface of the sphere

Question 18

The electric field at the center of the VDG dome is

Answer 18

Zero

Question 19

Ohm’s law is always observed across all electronic devices. T/F

Answer 19

False

Question 20

Three 10-Ohm resistors in series made from the same material always share the same

Answer 20

current, voltage, resistivity

Question 21

Ohm’s law in AC and DC domain treats the equivalent resistance the exact same way. T/F

Answer 21

True

Question 22

In the lab we experimented on resistors in series in the AC domain. When we increased the frequency without changing anything else, we observed that the current of the circuit

Answer 22

Remained the same

Question 23

Momentum exchange between electrons is one of the parameters that determines the resistivity of a wire. T/F

Answer 23

True

Question 24

The relative mean square (rms) quantity for electric potential in AC is ALWAYS

Answer 24

Greater than the numerical average of AC electric potential

Question 25

The basic function of an oscilloscope is to return the electric potential difference across ANY element in a circuit with respect to

Answer 25

Ground

Question 26

The resistance of the semi-conductor we studied in the lab

Answer 26

Exhibited a normal non-Ohmic behavior

Question 27

Both Kirchoff rules are NOT valid for AC current. T/F

Answer 27

False

Question 28

The phase difference between the voltages of two resistors in series connected to AC depends on

Answer 28

Frequency

Question 29

Both Kirchoff rules are NOT valid for AC current. T/F

Answer 29

False

Question 30

The plates of an isolated parallel plate capacitor with a capacitance C carry a charge Q. What is the capacitance of the capacitor if the charge is increased to 2Q?

Answer 30

C

Question 31

When the capacitor is fully charges in DC the current in the circuit is

Answer 31

zero

Question 32

Two capacitors in series that have the same charge density and same plate separation will always have the same

Answer 32

Capacitance, voltage, charge

Question 33

In an AC (sine-wave) domain, the time-series of the voltages b/w the capacitor and the entire resistor will ALWAYS be

Answer 33

exactly 90 degrees out of phase

Question 34

In an AC (sine-wave) domain, the time-series of the voltages b/w the capacitor and the entire circuit will ALWAYS be

Answer 34

none of these

Question 35

The capacitance will increase if one

Answer 35

Increase the plate separation

Question 36

Consider a capacitor and resistor in series in AC (sine-wave) domain. Does the time series of the voltage across the capacitor ever become zero?

Answer 36

no

Question 37

One of the major differences between DC and AC (sine-wave) is that when the circuit includes a capacitor is that

Answer 37

Capacitor has resistance, but dependent on frequency | Capacitance depends on frequency

Question 38

As AC (sine-wave) frequency increases in an RC in series, then the rms voltage across the resistor

Answer 38

approaches the RMS of the source