capitolo 2 libro elettronica

Question 1

legge di ohm

Answer 1

Ohm’s Law:

V=I×R, where V is voltage, I is current, and R is resistance. This law states that the voltage across a conductor is equal to the product of the current flowing through it and its resistance.

Question 2

voltaggio?

Answer 2

Voltage is an electric pressure and its the difference between negative and positive charges

Voltage, often referred to as electric potential difference, is the measure of electrical potential energy per unit charge in an electric circuit. In simpler terms, it represents the force or push that drives electric charges (like electrons) to move through a conductor, creating an electric current. The unit of measurement for voltage is the volt (V). Higher voltage indicates a greater potential for electric charge movement.

Question 3

elettricita?

Answer 3

Electricity is the movement of electrons from atom to atom. In order for the electrons to move in the same direction, an emf must be applied in the circuit

Question 4

watt?

Answer 4

Wattage is a measure of electrical power. It represents the rate at which electrical energy is generated or consumed in an electric circuit. The unit of measurement for wattage is the watt (W). One watt is equal to one joule per second.

In simple terms, wattage quantifies how much work can be done with electrical energy. It is often used to express the power of electrical devices, such as light bulbs, heaters, and electronic appliances. The relationship between power (P), voltage (V), and current (I) is given by the formula P=V×I, where P is power in watts, V is voltage in volts, and I is current in amperes.

Question 5

corrente elettrica

Answer 5

Electric current is the flow of electric charge through a conductor. In simpler terms, it’s the movement of electrons along a path, typically a wire. The unit of measurement for electric current is the ampere (A). Current can flow in two directions: positive to negative (conventional current flow) or negative to positive (electron flow). The flow of current is a fundamental concept in electricity and is essential for the operation of electrical devices and circuits

Question 6

circuiti in serie

Answer 6

Only one path for current to flow. If any of the components of the circuit fail, all the circuit fails. The current is generated by the battery, then it goes through all the resistor present inside the circuit until it arrives to the negative part of the battery.

The total resistance of a series circuit is the sum of all the resistors.

Question 7

circuiti in parallelo

Answer 7

Each path flow has a separate resistance that operates indipendently. The current can flow through more than one leg at a time and so failure in one component dosent affect failure of others.

Characteristics:

1. the voltage in each parallel leg is the same
2. the voltage drop if there are the same number of resistor is the same otherwise it will depend on each of the resistor in that leg
3. the total resistance has many ways to be calculated
4. the current flow through the legs will be different if the resistance is different
5. the sum of current of each leg is the total current inside the parallel circuit

Question 8

prima legge di kirchoff

Answer 8

Questa legge afferma che la somma delle correnti in ingresso in qualsiasi nodo in un circuito è uguale alla somma delle correnti in uscita dallo stesso nodo. In termini più semplici, quello che entra in un punto deve essere uguale a quello che esce.

Question 9

seconda legge di kirchoff

Answer 9

Questa legge afferma che la somma algebrica delle differenze di potenziale (tensioni) in qualsiasi circuito chiuso è zero. In altre parole, la somma delle cadute di tensione è uguale alla somma delle tensioni fornite.