Studied by 17 people

0.0(0)

get a hint

hint

1

Electric Current

The continuous flow of charge in a circuit, measured in amperes (A).

New cards

2

Average Current

I_{avg = }change in charge/change in time

New cards

3

Battery

A battery is a device that maintains an electric potential difference between the two terminals.

New cards

4

Voltage

The electric potential difference between two points in a circuit, measured in volts (V).

New cards

5

Ohm’s Law

*V = IR*

R is the resistance in the circuit.

V is the potential difference in the circuit

I is the electric current

New cards

6

Resistance

It is the impedance to the flow of electricity through a material. Asa charge moves through a material, it eventually hits a non-moving nucleus in the material.

New cards

7

Equivalent Resistance

The resulting resistance when two or more resistors are combined in a circuit.

New cards

8

Resistors in Series

Resistors arranged sequentially in a circuit, resulting in a total resistance equal to the sum of individual resistances.

New cards

9

Resistivity

It can be thought of as the density of nuclei the electrons may strike.

*R = ρ l / A*

R = resistance of the circuit

ρ = resistivity

l = length

A = cross-sectional area

New cards

10

low resistivity

conductors

New cards

11

high resistivity

insulators

New cards

12

Resistors in Parallel

Resistors arranged in branches in a circuit, resulting in a total resistance less than the smallest individual resistance.

New cards

13

Ammeter

A device with low resistance used to measure electric current in a circuit.

New cards

14

Power Dissipation

The power dissipated by a circuit component, calculated as the product of current and voltage:P = VI.

New cards

15

Voltmeter

A device used to measure the electric potential difference in a circuit.

New cards

16

Ohm's Law

The relationship between potential difference (V), current (I), and resistance (R) in a circuit:V = IR.

New cards

17

Capacitance

*C = QV*

C = refers to the capacitance that we measure in farads

Q = refers to the equal charge that we measure in coulombs

V = refers to the voltage that we measure in volts

Besides, there is another formula that appears like this:

*C = kε0Ad*C = refers to the capacitance

K = refers to the relative permittivity

ε0 = refers to the permittivity of free space

A = refers to the surface area of the plates

d = refers to the distance between places measured

New cards

18

Capacitors in parallel

Cp = C1 + C2

New cards

19

Capacitors in series

1/Cs = 1/C1 + 1/C2

New cards

20

Name three possible energy sources for a circuit

Battery

Photoelectric cell

Generator

New cards

21

What will happen to the charges in a circuit when a switch is closed?

The charges will flow through the circuit.

New cards

22

What will happen to the charges in a circuit when a switch is open?

The circuit is broken and the charges stop flowing through the circuit.

New cards

23

What is the standard voltage per branch in a home in the United States?

120V

New cards

24

A switch that automatically opens if the current is too high is a ________________

Circuit Breaker

New cards

25

The symbol used to represent resistance in a schematic diagram is

The symbol used to represent resistance in a schematic diagram is

New cards

26

When two light bulbs are connected in series, the

same amount of current always flows through each bulb

New cards

27

When resistors are put in parallel with each other their overall resistance is

smaller than the resistance of any of the resistors

New cards

28

As more lamps are put into a series circuit, the overall current in the circuit

decreases

New cards

29

As more lamps are put into a parallel circuit, the overall current in the circuit

increases

New cards

30

When one light bulb in a parallel circuit containing several light bulbs burns out, the other light bulbs

burn the same as before

New cards

31

Electrical devices in our homes are connected in

parallel

New cards