Electrical Circuits: Capacitors

Question 1

Capacitance acts to store electrical energy as

Answer 1

electric field

Question 2

As capacitor plate area increases, all other things being equal

Answer 2

The capacitance increases

Question 3

As the spacing between plates in a capacitor is made smaller, all other things being equal

Answer 3

The capacitance increases

Question 4

A material with a high dielectric constant

Answer 4

Acts to increase capacitance per unit volume

Question 5

A capacitance of 100 pF is the same as ______ μF

Answer 5

0.0001 μF

Question 6

Five 0.050-μF capacitors are connected in parallel. The total capacitance is

Answer 6

0.25 μF

Question 7

Five 0.050-μF are connected in series, the total capacitance will be

Answer 7

0.010 μF

Question 8

Two capacitors are in series. Their values are 47 pF and 33 pF. The composite value is

Answer 8

19 pF

Question 9

Three capacitors are in parallel. Their values are 0.0200 μF, 0.0500 μF and 0.10000 μF. The total capacitance is

Answer 9

0.170 μF

Question 10

Air works well as a dielectric mainly because it

Answer 10

Has low loss

Question 11

Which of the following is not a characteristic of mica capacitors?

A. High efficiency.
B. Small size.
C. Capability to handle high voltages.
D. Low loss.

Answer 11

Small size

Question 12

A disk ceramic capacitor might have a value of
A. 100 pF.
B. 33 μF.
C. 470 μF.
D. 10,000 μF

Answer 12

100 pF

Question 13

A paper capacitor might have a range of:

Answer 13

1nF to 1μF.

Question 14

An air-variable capacitor might have a range of

Answer 14

1 pF to 100 pF.

Question 15

Which of the following types of capacitors is polarized?
A. Paper
B. Mica.
C. Interelectrode.
D. Electrolytic.

Answer 15

Electrolytic

Question 16

If a capacitor has a negative temperature coefficient

Answer 16

Its value decreases as the temperature rises.

Question 17

A capacitor is rated at 33 pF, plus or minus 10 percent. Which of the following capacitances is outside the acceptable range?

Answer 17

37 pF

Question 18

A capacitor, rated at 330 pF, shows an actual value of 317 pF. How many percent off is its value?

Answer 18

3.9

Question 19

a two terminal passive device that stores energy as electric field

Answer 19

capacitance

Question 20

it is how much charge you can hold per voltage

Answer 20

capacitance

Question 21

a 330pF capacitor and a 220pF capacitor are each connected across a 6Vdc source . The voltage across the 330pF capacitor is?

Answer 21

6V

Question 22

unit for capacitance

Answer 22

Farads (F)

Question 23

Unit for charge

Answer 23

Coloumb (C)

Question 24

How to find constant value of electron charge in the calculator

Answer 24

shift+const+47

Question 25

What is the constant value of an electron charge

Answer 25

1.602x10^-19

Question 26

Is voltage(V) and electric potential energy(V) similar?

Answer 26

Voltage is the difference in electric potential energy. or the change in electric potential energy

Question 27

dielectric constant (k) of the insulator air

Answer 27

1.006

Question 28

what is ghrdielectric constant (k) of a vacuum

Answer 28

1

Question 29

what is the dielectric constant of the insulator quartz?

Answer 29

4.3

Question 30

what is the dielectric constant (k) of water

Answer 30

80

Question 31

How to input the value of absolute permitivity (Eo) on your calculator

Answer 31

shift+const+32

Question 32

What is the value of absolute permitivity?

Answer 32

8.85x10^-12

Question 33

to get the the permitivity (E):

Answer 33

dielectric k (aka relative permitivity) multiplied by the absolute permitivity

Question 34

the formula to get the electric field of the capacitor is

Answer 34

E= Voltage/distance between plates

Question 35

current flow from _____ electric potential to _____ electric potential

Answer 35

high, low

Question 36

In metals, ______ move and ______ does not.

Answer 36

electrons, protons