kahoot questions

true or false : single phase power has 100% voltage ripple

• true

___is the study of stationary electric charges

• electrostatics

an object is said to be electrified if it has___

• to few electrons & to many electrons (A&C)

what is the smallest unit of electric charge

• electron

unlike charges___, and like charges____

• attract, repel

true or false: coulomb’s law states: as an electrostatic force increases, the distance between the electrostatic charge increases

• false

what is the unit of electric potential

• volt

in our homes, electric potential is

• 110 volts

what is electric current measured in

• amperes

___is a material that acts like a conductor and an insulator in certain conditions

• semiconductor

what is the formula for ohms law

• V=IR

true or false: any charged particle in motion creates a magnetic field

• true

electric power is measured in

• watts

rectification uses___to convert AC to DC

• diodes

when a group of diploes align, they create ___

• a magnetic domain

true or false : tesla is the SI unit of magnetic field strength

• true

who discovered the magnetic fields can be used to generate electricity

• Michael faraday

in a step-up transformer, the voltage___and the current___

• increases, decreases

which part of the x-ray circuit increases the voltage

• step-up transformer

the power that Is delivered to hospitals and finally to the x-ray unit may easily vary

• 10%

true or false: high voltage is needed to puch electrons from the cathode to the anode

• true

true or false: x-ray quality is indirectly proportional to the mAs

• false

___refers to the number of x-rays or the intensity of the x-ray beam

• radiation quantity

what is the function of rectifier

• changing alternting current to direct current

___refers to the penetrability of the x-ray beam

• radiation quality

true or false : electrons flow from the anode to the cathode

• false

the most accurate type of timer is the ___timer

• electronic

true or false: high-frequency generators have approx. 1% voltage ripple

• true

true or false: 1 coulomb=6.3×10^18

• true

true of false: when the current flows in one direction, this is considered direct current

• true

the three main parts of the x-ray imaging system are the x-ray tube, ___and____

• operating console, high-voltage generator

true of false: the operating console is on low-voltage side of the x-ray circuit

• true

the power supplied to the x-ray imaging system first goes to:

• the autotransformer

true or false: rectification uses capacitors to convert AC to DC

• false