There are two types of current, direct current (DC) and alternating current (AC).
What is the electrical theory?
Electrical theory is a basic building block that every potential electrician must understand from the start. … Electrical theory is important to understand the function and operation of electrical equipment to ensure proper installation and to complete tasks such as troubleshooting electrical systems and equipment.
What are the 2 basic types of circuits?
Series and parallel circuits
- There are two types of circuit we can make, called series and parallel.
- If there are no branches then it’s a series circuit.
- If there are branches it’s a parallel circuit.
What is AC DC theory?
In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.
What is basic electrical knowledge?
In order to make sense of the Code, you must first understand basic electrical concepts such as voltage, amperage, resistance, Ohm’s law, wattage, circuit theory and others. … An obvious foundation for all electrical installations is a thorough knowledge of the laws that govern the operation of electricity.
What are the basic electrical symbols?
Basic Electrical Symbols
- Ground or Earth. A ground symbol (IEC symbol 5017) identifies a ground terminal. …
- Resistor. A resistor reduces current flow. …
- Switch. Disconnects the current when open. …
- Capacitor. A capacitor symbol shows two terminals running into plates. …
- Fuse. …
- Antenna. …
- Inductor. …
What are the 2 types of currents?
Current electricity is a constant flow of electrons. There are two kinds of current electricity: direct current (DC) and alternating current (AC).
Is a battery AC or DC?
Batteries and electronic devices like TVs, computers and DVD players use DC electricity – once an AC current enters a device, it’s converted to DC. A typical battery supplies around 1.5 volts of DC.
Is 12V AC or DC?
AC means Alternating Current and DC means Direct Current. AC and DC are also used when referring to voltages and electrical signals which are not currents! For example: a 12V AC power supply has an alternating voltage (which will make an alternating current flow).
Which is better AC or DC?
AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.