Chaper 4-Electricity Flashcards Preview

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Flashcards in Chaper 4-Electricity Deck (64)
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1

The number of electrons flowing in an electric circuit would describe the

Amp

2

_____ is the study of stationary electric charges

Electrostatistics

3

The amount of amperage transmitted in a direct current, series circuit of 50 volts and 5 ohms would be

10 mAs

4

Which would offer the greatest resistance to a series circuit?

A? Short, thick conductor
B? Long, thin conductor

B

5

What material would be the least effective as an electrical insulator

Copper, Wood, or Glass

Copper

6

List three ways to electrify and object

A. Friction
B. Contact
C. Induction

7

In a direct current circuit, how many volts would be required to transit 5 Amos through resistances of 3 ohms, 5 ohms, and 8 ohms wired in series?

80 volts

8

What would express voltage in a circuit?

Amps X resistance

9

The equation for the "Power Rule"?

P=I or W=VA

10

Four Electrostatic Laws

A. Likes repel, opposites attract
B. Electric Charge Distrubution
C. Coulombs Law
D. Electric Charge Concentration

11

What is the equation for "Power Loss"?

P=I2 X R

12

In space, flux lines from a magnet travel from:

North to South

13

What is the unit of electrical resistance?

Ohm

14

Wha is he unit of potential difference?

Volt

15

Contact confers the _____ charge

Same

16

Induction corners the _____ charge

Opposite

17

Ground potential equals ______

0

18

Primary function of X-Ray unit=convert _____ energy into electromagnetic energy of x-ray beam.

Electric

19

Converts chemical to electrical energy

Battery

20

Converts electrical to mechanical energy

Motor

21

Converts to electrical to heat/thermal energy

Toaster/stove

22

Converts mechanical to electrical energy

Generator

23

1. Are free to travel from outermost shell of an atom to the next.
2. Possesses what charge?

1. Electrons
2. -

24

1. Fixed inside nucleus of atom and are NOT free to move.
2. Possesses what the of charge?

1. Proton
2. +

25

Occurs when an object becomes charged by removal or addition of electrons

Electrification

26

Contact confers the __1__ charge.
Induction confers the __2__ charge.

1. Same
2. Opposite

27

Earth behaves as a huge reservoir for stray electrical charges=

Electrical ground

28

Electrostatic force is directly proportional to product of charges and inversely proportional to square of distance between them

Coulomb's law

29

Most charges reside on __1__ surface and constituted along the __2__ of surface

1. External
2. Sharpest

30

Unit of electric potential

Volt