Current Electricity

Question 1

__________ are literal representations of circuits

Answer 1

Pictorial Circuit Diagrams

Question 2

_________ are the standard format to represent circuits

Answer 2

Schematic Circuit Diagram

Question 3

Which way do electrons flow?

Answer 3

Negative - positive

Question 4

Which way does current flow?

Answer 4

Positive - Negative

Question 5

What is the electric potential difference?

Answer 5

Electrons accumulate at one terminal, making it negative and the other positive. The electrons are energized to go to the positive terminal; difference between anode and cathode

Question 6

Is the anode positive or negative?

Answer 6

Positive

Question 7

Is that cathode positive or negative?

Answer 7

Negative

Question 8

What is resistance?

Answer 8

Anything you add to a circuit that hinders the motion of electrons (motor, light bulb)

Question 9

Resistance depends on which 4 factors?

Answer 9

Type of material, length, diameter, temperature

Question 10

What is the formula for resistance?

Answer 10

R = V/I

Question 11

What is the formula for density?

Answer 11

D = m/V

Question 12

What is the formula for current?

Answer 12

I = Q/t

Question 13

What is the formula for potential different / voltage?

Answer 13

V = E/Q

Question 14

1 electron is _________ coulombs.

Answer 14

1 electron = 1.602 x 10^-19 coulombs

Question 15

1 coulomb is _________ electrons

Answer 15

1 coulomb = 6.25 x 10^18 electrons

Question 16

What are the formulas for calculating total resistance?

Answer 16

Series = R1 + R2 + R3…

1/ Parallel = 1/R1 + 1/R2 + 1/R3…

Question 17

What is the symbol for charge?

Answer 17

Q

Question 18

What is the symbol for current?

Answer 18

I

Question 19

What is the unit for energy?

Answer 19

Joules

Question 20

What is the unit for charge?

Answer 20

Coulombs

Question 21

What is the unit for current?

Answer 21

Ampere (c/s)