X-Ray Circuit and Electricity Concepts

These flashcards cover important concepts related to the x-ray circuit and electricity, including definitions and explanations of key terms.

Electric Potential

The potential energy that a unit of charge has at a point in an electric field; drives electrons to move.

Current

The flow of electrons through a conductor, measured in Amperes (A).

Resistance

The opposition to the flow of electric current, measured in Ohms (Ω).

Ohm's Law

The relationship between voltage (V), current (I), and resistance (R) in a circuit, expressed as V = I × R.

Electrostatics

The study of stationary electric charges.

Electrodynamics

The study of electric charges in motion.

Coulomb

The SI unit for electrical charge, equivalent to approximately $6.25 imes 10^{18}$ electrons.

Transformer

A device that uses electromagnetic induction to change voltage levels in AC circuits.

Step-Up Transformer

Increases voltage from primary to secondary coil, facilitating high voltage for x-ray production.

Step-Down Transformer

Decreases voltage to protect components like the filament by allowing high current.

Rectification

The process of converting AC to DC to ensure electrons flow in one direction during x-ray production.

DC

Direct Current, where electrons flow in one direction.

AC

Alternating Current, where electrons change direction rapidly.

Thermionic Emission

The process where electrons are boiled off from a heated filament.

Conductors

Materials that allow electrons to flow easily, like copper; they provide a path for current.

Insulators

Materials that do not allow electric current to flow easily; they have high resistance.

Semiconductors

Materials with properties between conductors and insulators, used in various electronic devices.

Capacitor

A device that stores and releases electrical energy briefly, helping to smooth out voltage changes.

Inductor

A coil of wire that resists changes in current, found in transformers and motors.

Focusing Cup

A part of the x-ray cathode that shapes and directs the electron cloud toward the anode.

Electromagnetic Induction

The process of creating an electric current by changing the magnetic field around a conductor.

Rectifiers (Diodes)

Devices that allow current to flow in one direction, essential for converting AC to DC in x-ray circuits.

Lorentz Force

The force that acts on a charged particle moving through a magnetic field, influencing its path.

Filament Circuit

A low-voltage, high-current section that heats the filament to create electrons.

Primary Circuit

The part of the x-ray circuit that prepares and delivers high voltage to the x-ray tube.

Secondary Circuit

The part of the x-ray circuit that pushes high-energy electrons across the x-ray tube.

Rheostat

A variable resistor that controls the filament current (mA) by adjusting heat.

Voltage Ripple

Variation in voltage output after rectification; lower ripple indicates more efficient x-ray production.