Podcast
Questions and Answers
What is the primary role of voltage in an electrical circuit?
What is the primary role of voltage in an electrical circuit?
- It measures the restriction to current flow.
- It indicates the amount of current flowing.
- It describes the energy consumption of the circuit.
- It is the push that causes electrons to flow. (correct)
What is the equivalent term for 'volts' in fluid power systems?
What is the equivalent term for 'volts' in fluid power systems?
- Force
- Volume
- Pressure (correct)
- Flow rate
Which voltage range is typically used for stationary electric motors in hydraulic systems?
Which voltage range is typically used for stationary electric motors in hydraulic systems?
- 5v to 8v
- 12v to 24v
- 2v to 10v
- 120v to 440v (correct)
What does resistance in an electrical circuit restrict?
What does resistance in an electrical circuit restrict?
What is the relationship between current, voltage, and resistance as described by Ohm's Law?
What is the relationship between current, voltage, and resistance as described by Ohm's Law?
What happens to current flow as resistance increases in a circuit?
What happens to current flow as resistance increases in a circuit?
Which of the following describes the flow rate of electrons in an electric circuit?
Which of the following describes the flow rate of electrons in an electric circuit?
What characterizes alternating current (AC) in an electrical system?
What characterizes alternating current (AC) in an electrical system?
Voltage is equivalent to the pressure in a hydraulic system.
Voltage is equivalent to the pressure in a hydraulic system.
Direct current provides an intermittent flow of current, unlike alternating current.
Direct current provides an intermittent flow of current, unlike alternating current.
The measure of current flow in a circuit is expressed in volts.
The measure of current flow in a circuit is expressed in volts.
As resistance increases in a circuit, the amount of current will also increase.
As resistance increases in a circuit, the amount of current will also increase.
Electricity can occur naturally or be produced artificially.
Electricity can occur naturally or be produced artificially.
The restriction to current flow within a circuit is termed volts.
The restriction to current flow within a circuit is termed volts.
The flow rate of electrons in a circuit is akin to gallons per minute in a fluid system.
The flow rate of electrons in a circuit is akin to gallons per minute in a fluid system.
Typical voltage ranges for hydraulic systems do not exceed 120v.
Typical voltage ranges for hydraulic systems do not exceed 120v.
Flashcards
Electricity
Electricity
A fundamental form of energy, observable as positive and negative, occurring naturally or produced, and manifested through the movement and interactions of electrons.
Voltage
Voltage
The amount of 'push' that causes electrons to flow in a circuit, analogous to pressure in fluid systems.
Current (Amps)
Current (Amps)
The flow rate of electrons in a circuit, similar to gallons per minute in fluid systems.
Resistance (Ohms)
Resistance (Ohms)
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Ohm's Law
Ohm's Law
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Alternating Current (AC)
Alternating Current (AC)
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Direct Current (DC)
Direct Current (DC)
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Typical Voltage Ranges
Typical Voltage Ranges
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Electricity
Electricity
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Voltage
Voltage
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Current (Amps)
Current (Amps)
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Resistance (Ohms)
Resistance (Ohms)
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Ohm's Law
Ohm's Law
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Alternating Current (AC)
Alternating Current (AC)
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Direct Current (DC)
Direct Current (DC)
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Typical Voltage Ranges
Typical Voltage Ranges
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Study Notes
Electronics Introduction
- Electronics controls electricity without moving parts
- Automobiles in the 1960s used voltage regulators for electric ignitions
- Improved performance and reliability are key aspects of electronics
- Electronics are now crucial in trucks, automobiles, brake systems, and electric diesel injection systems
- Electricity is a fundamental form of energy, observed as positive and negative, generated naturally or produced
- It involves electron movement and interactions
- Similar to fluid power systems, electricity involves pressure (voltage), volume (amps), and force (watts)
What is Electricity?
- Electronic control systems are based on pressure, volume, and force
- Pressure is voltage (measured in Volts)
- Volume is amperage (measured in Amps)
- Force is wattage (measured in Watts)
Voltage
- Voltage is the force that pushes electrons through a circuit
- Similar to how pressure pushes fluid through a hose, voltage pushes electrons from high to low pressure (surplus to shortage)
- Voltage alone does not do work
Hydraulic Systems
- Use alternating current (AC) and direct current (DC)
- Alternating current pulses electricity
- Direct current provides a smooth flow of electricity
- Various voltage levels (120V to 440V, 12V to 24V, 5V to 8V) are used in hydraulic systems
Amps
- Amps measure the flow rate of electrons (current)
- Similar to gallons per minute in hydraulic systems
- One amp with one volt is equivalent to 6.28 billion electrons passing a point
- The number of electrons is determined by circuit resistance.
Resistance (Ohms)
- Resistance is measured in Ohms
- Resistance affects current flow, decreased current with increased resistance
- Factors affecting resistance include material, length, diameter and connections of a conduit. Other examples include frayed wires or corrosion
- Ohm's law describes the relationship between current, voltage and resistance, with current being directly proportional to voltage and inversely proportional to resistance.
- Increased voltage results in increased current, given constant resistance
- Increased resistance results in decreased current, given constant voltage.
Watts
- Watts measure electrical power
- Watts equal the product of volts and amps (Watts = Volts x Amps)
- Watts represent work done by an electrical circuit
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