Phys 202 Test 1

Front 1

the units of capacitance are equivalent to

Back 1

C^2/J

Front 2

A farad is the same as a

Back 2

C/V

Front 3

A capacitor C “has a charge Q”. The actual charges on its plates are:

Back 3

Q,−Q

Front 4

Each plate of a capacitor stores a charge of magnitude 1 mC when a 100-V potential differenceis applied. The capacitance is

Back 4

10μF

Front 5

to charge a 1-F capacitor with 2 C requires a potential difference of:

Back 5

2 V

Front 6

The capacitance of a parallel-plate capacitor with plate areaAand plate separationdis givenby

Back 6

E0*A/d

Front 7

The capacitance of a parallel-plate capacitor is:

Back 7

proportional to the plate area

Front 8

the plate areas and plate separations offive parallel plate capacitors are capacitor 1: areaA0, separation d0capacitor 2: area 2A0, separation 2d0capacitor 3: area 2A0, separation d0/2capacitor 4: areaA0/2, separation 2d0capacitor 5: areaA0, separation d0/2Rank these according to their capacitances, least to greatest.

Back 8

4, 1 and 2 tie, then 5, 3

Front 9

the capacitance of a parallel-plate capacitor can be increased by:

Back 9

decreasing the plate separation

Front 10

If both the plate area and the plate separation of a parallel-plate capacitor are doubled, the capacitance is:

Back 10

unchanged

Front 11

if the plate area of an isolated charged parallel-plate capacitor is doubled:

Back 11

the potential difference is halved

Front 12

If the plate separation of an isolated charged parallel-plate capacitor is doubled:

Back 12

A. the electricfield is doubledB. the potential difference is halvedC. the charge on each plate is halvedD. the surface charge density on each plate is doubled->E. none of the above

Front 13

Pulling the plates of an isolated charged capacitor apart

Back 13

ncreases the potential difference

Front 14

If the charge on a parallel-plate capacitor is doubled:

Back 14

the electric field is doubled

Front 15

A parallel-plate capacitor has a plate area of 0.2m^2 and a plate separation of 0.1mm. Toobtain an electricfield of 2.0×10^6V/m between the plates, the magnitude of the charge oneach plate should be:

Back 15

7.1×10^−6C

Front 16

A parallel-plate capacitor has a plate area of 0.2m^2and a plate separation of 0.1 mm. If thecharge on each plate has a magnitude of 4×10−6C the potential difference across the platesis approximately:

Back 16

2×10^2V

Front 17

The capacitance of a spherical capacitor with inner radius a and outer radius b is proportional to

Back 17

ab/(b-a)

Front 18

the capacitance of a single isolated spherical conductor with radiusRis proportional to

Back 18

R

Front 19

Two conducting spheres have radii of R1 and R2, with R1 greater than R2. If they are farapart the capacitance is proportional to

Back 19

ncreasing both the radius of the inner cylinder and the length

Front 20

A battery is used to charge a series combination of two identical capacitors. If the potentialdifference across the battery terminals is V and total charge Q flows through the battery during the charging process then the charge on the positive plate of each capacitor and the potential difference across each capacitor are:

Back 20

Q and V/2 respectively

Front 21

A battery is used to charge a parallel combination of two identical capacitors. If the potentialdifference across the battery terminals isVand total chargeQflows through the battery duringthe charging process then the charge on the positive plate of each capacitor and the potentialdifference across each capacitor are

Back 21

Q/2 and V respectively

Front 22

A 2-μFanda1-μF capacitor are connected in series and a potential difference is applied acrossthe combination. The 2-μF capacitor has

Back 22

half the potential difference of the 1-uF capacitor

Front 23

A 2-μFanda1-μF capacitor are connected in parallel and a potential difference is appliedacross the combination. The 2-μF capacitor has:

Back 23

twice the charge of the 1-μF capacitor

Front 24

Let Q denote charge,V denote potential difference, and U denote stored energy. Of thesequantities, capacitors in series must have the same

Back 24

Q only

Front 25

LetQdenote charge,Vdenote potential difference, andUdenote stored energy. Of thesequantities, capacitors in parallel must have the same:

Back 25

V only

Front 26

CapacitorsC1andC2are connected in parallel. The equivalent capacitance is given by

Back 26

C1+C2

Front 27

CapacitorsC1andC2are connected in series. The equivalent capacitance is given by

Back 27

C1C2/(C1+C2)

Front 28

CapacitorsC1andC2are connected in series and a potential difference is applied to thecombination. If the capacitor that is equivalent to the combination has the same potentialdifference, then the charge on the equivalent capacitor is the same as:

Back 28

the charge onC1

Front 29

CapacitorsC1andC2are connected in parallel and a potential difference is applied to thecombination. If the capacitor that is equivalent to the combination has the same potentialdifference, then the charge on the equivalent capacitor is the same as

Back 29

the sum of the charges onC1andC2

Front 30

CapacitorsC1andC2are connected in parallel and a potential difference is applied to thecombination. If the capacitor that is equivalent to the combination has the same potentialdifference, then the charge on the equivalent capacitor is the same as

Back 30

he sum of the charges onC1andC2

Front 31

wo identical capacitors are connected in series and two, each identical to thefirst, are con-nected in parallel. The equivalent capacitance of the series connection is ____ the equivalentcapacitance of parallel connection

Back 31

1/4

Front 32

Two identical capacitors, each with capacitanceC, are connected in parallel and the combi-nation is connected in series to a third identical capacitor. The equivalent capacitance of thisarrangement is

Back 32

2C/3

Front 33

A 2-μFanda1-μF capacitor are connected in series and charged from a battery. They storechargesPandQ, respectively. When disconnected and charged separately using the samebattery, they have chargesRandS, respectively. Then

Back 33

R>S>Q=P

Front 34

CapacitorC1is connected alone to a battery and charged until the magnitude of the chargeon each plate is 4.0×10−8C. Then it is removed from the battery and connected to two othercapacitorsC2andC3, as shown. The charge on the positive plate ofC1is then 1.0×10−8C.The charges on the positive plates ofC2andC3are

Back 34

q2 = 3*10^-8C & q3 = 3*10^-8C

Front 35

Each of the four capacitors shown is 500μF. The voltmeter reads 1000 V. The magnitude ofthe charge, in coulombs, on each capacitor plate is

Back 35

0.5

Front 36

The diagram shows four 6-μF capacitors. The capacitance between points a and b is

Back 36

6uF

Front 37

Each of the two 25-μF capacitors shown is initially uncharged. How many coulombs of chargepass through the ammeter A after the switch S is closed?

Back 37

0.2

Front 38

A 20-F capacitor is charged to 200 V. Its stored energy is

Back 38

0.4 J

Front 39

charged capacitor stores 10 C at 40 V. Its stored energy is:

Back 39

200J

Front 40

A 2-μF and a 1-μF capacitor are connected in series and charged by a battery. They storeenergiesPandQ, respectively. When disconnected and charged separately using the samebattery, they store energiesRandS, respectively. Then:

Back 40

R>S>Q>P