What is a potential divider used for?
A potential divider is a simple circuit that uses resisters(or thermistors / LDR’s) to supply a variable potential difference. They can be used as audio volume controls, to control the temperature in a freezer or monitor changes in light in a room.
Why do we need voltage?
Electrical energy is carried through conducting material (such as power lines) by electrons. The transmission line’s voltage measures how much potential energy each electron is carrying as it moves along the power line. Voltage combines with current to define how much power flows through the network.
How does a voltage source work?
A voltage source is a two-terminal device which can maintain a fixed voltage. An ideal voltage source can maintain the fixed voltage independent of the load resistance or the output current. However, a real-world voltage source cannot supply unlimited current. A voltage source is the dual of a current source.
What is the most common method for producing a voltage?
The six most common voltage sources are friction, magnetism, chemicals, light, heat, and pressure. Friction is the oldest known method of producing electricity.
What is voltage and resistance?
Voltage is the difference in charge between two points. Current is the rate at which charge is flowing. Resistance is a material’s tendency to resist the flow of charge (current).
How do you calculate voltage and resistance?
Ohms Law and Power
- To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
- To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
- To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
- To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)
What are the basic concepts of electronics?
Electrical current, voltage, resistance, capacitance, and inductance are a few of the basic elements of electronics and radio. Apart from current, voltage, resistance, capacitance, and inductance, there are many other interesting elements to electronic technology.