RT 205 Electricity

Question 1

Formula for Ohm’s Law

Answer 1

V=IR
V= Potential Difference (Volts)
I= Current (Amperes)
R= Resistance (Ohms)

Question 2

Formula for Power Law

Answer 2

P=IV
P= Power (Watts)
I= Current (Amperes)
V= Voltage (volts)

Question 3

The study of the distribution of fixed charges (electrons) that are not at rest

Answer 3

Electrostatics

Question 4

Electron charges being added and subtracted from an object

Answer 4

Electrification

Question 5

First Law of electrostatics

Answer 5

Repulsion-Attraction - Like charges repel, negative charges attract

Question 6

Second Law of electrostatics

Answer 6

Inverse square law - Force between two charges directly proportional to product of their magnitudes and inversely proportional to square of distance between them.

Question 7

Third Law of electrostatics

Answer 7

Distribution - Charges reside on the external surface of conductors

Question 8

Fourth Law of electrostatics

Answer 8

Concentration - The greatest concentration of charges will gather at sharpest area of curvature

Question 9

Fifth Law of electrostatics

Answer 9

Movement - Only negative charges move along solid conductors.

Question 10

Electrical force is proportional to the product of the electrical charge and inversely proportional to the square of the distance.

Answer 10

Coulomb’s Law

Question 11

Formula for Coulomb’s Law

Answer 11

F= k (q1 x q2/d^2

F= Force
k= 9.00 x 10^9 Nm^2/C^2
q1= electrified charge of object 1
q2= electrified charge of object 2
d^2= distance between the two objects

Question 12

The fundamental charge is the electrical chare on an charge on an electron and has a magnitude of ________________.

Answer 12

1.6 x 10^-19 C

Question 13

A coulomb is the charge resulting from the transfer of ______________, which is the charged carried by an electron.

Answer 13

6.24 x 10^18

Question 14

Have a small fraction of their electrons, which are not bound to atoms, which move freely around.

Answer 14

Conductor

Question 15

A substance, usually a solid chemical element or compound, that can conduct electricity under some condition, but not others.

Answer 15

Semiconductor

Question 16

Substances that inhibit the flow of electrons

Answer 16

Insulators

Question 17

Conventional Current

Answer 17

Electrons move from areas of high to low concentration

Question 18

Conventional Electric Flow

Answer 18

Going from a positive to a negative pole

Question 19

Conventional Electron Flow

Answer 19

Going from negative to a positive pole

Question 20

AC Sine wave-

Answer 20

Electrons flow in one direction and than the other.

Question 21

DC Sine wave -

Answer 21

Electrons travel in one direction

Question 22

1 Amp = ___________

Answer 22

1 Amp = 1 Coulomb/sec

Question 23

AC Current = ____________ or ____________

Answer 23

AC Current = 60 cycles/sec = 60 Hz

Question 24

Voltmeter

Answer 24

Measures the voltage across a circuit

Question 25

Ammeter

Answer 25

Measures current

Question 26

Ohmmeter

Answer 26

Measures resistance of one resistor in a circuit

Question 27

1 Voltage = _____________

Answer 27

1 Voltage = 1 J/C

Question 28

The force at which electrons travel is best described by _____________, ______, and _________.

Answer 28

Potential difference, EMF, and voltage