Electrical Circuits & Resistance Variations

Question 1

The flow of electrons

Answer 1

Electric current

Question 2

instantaneous electric current (equation)

Answer 2

i = dq/dt

Question 3

unit for current

Answer 3

Ampere (Coulomb/sec)

Question 4

The current flow convention, known simply as “current flow” is from…

Answer 4

Positive to negative

Question 5

How many electrons are there in 1 Coulomb?

Answer 5

1 C = 6.25 x 10^18 e

Question 6

Force that pushes the current to flow

Answer 6

Voltage

Question 7

Voltage is also known as…?

Answer 7

Potential difference/Electromotive Force

Question 8

An active element that provides a specified voltage or current that is completely independent of other circuit variables

Answer 8

Independent source (e.g., power source)

Question 9

An interconnection of elements or devices; doesn’t need to be closed

Answer 9

Network

Question 10

A network providing one or more closed paths

Answer 10

Circuit

Question 11

Represents a single element (or group of elements) such as voltage source or resistor; usually enclosed by a node

Answer 11

Branch

Question 12

The point of connection between two or more branches

Answer 12

Node

Question 13

Any closed path in a circuit

Answer 13

Loop

Question 14

The little equation thing to check if your number of nodes, loops, and branches are correct.

Answer 14

b = l + n - 1

Question 15

The difficulty of the current to flow

Answer 15

Resistance

Question 16

Units of resistance

Answer 16

Ohms (Ω)

Question 17

Mathematical definition of resistance

Answer 17

R = (ρl)/A

Question 18

ρ stands for…?

Answer 18

Material resistivity

Question 19

when resistance is 0 and current can move easily, you have a…?

Answer 19

Shorted part

Question 20

Current flow that goes from negative to positive

Answer 20

Electron flow

Question 21

1 meter is equal to how many feet?

Answer 21

1 m = 3.28 ft