PMR Exam 1 Questions And 100% Correct AnswersFlow of electrons along a conduction medium
What is amperage?
Force that is pushing electrons through an object
What is voltage?
Opposite charges are separate
Like charges are bought together
What can create voltage?
Polarity
What is the term tha...
What is the term that is used to indicate the relative charge of terminals or leads of a
circuit?
Negative electrode (black)
**A Cation is positive, but a cathode is negative - A cathode attracts cations**
What type of charge is a cathode?
Positive electrode (red)
**A Anion is negative, but an anode is positive - An anode attracts anions**
What type of charge is an anode?
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Resistance - The opposition to the flow of a direct types of current
Impedance - The opposition to the flow of alternating types of current
What is the difference between resistance and impedance?
Impedance
What is the opposition to the flow of alternating types of current?
Resistance
What is the opposition to the flow of direct types of current?
Ohms
What is the measurement of resistance or impedance?
The current in a circuit is directly proportional to the applied voltage and inversely
proportional to the circuit resistance.
Current flow = Voltage/Resistance
I = V/R
What is ohms law?
Muscles
Peripheral nerves
Blood
What tissues in the body are considered conductors?
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Skin
Skin oil
Fat
Hair
What tissues in the body are considered insulators?
Decrease resistance
If you increase temperature of a circuit, will it increase or decrease the resistance?
Decrease resistance
If you increase the cross section of a circuit, will it increase or decrease the resistance?
Increase resistance
If you increase the length of a circuit, will it increase or decrease the resistance?
Phase
What is the term for the electrical event when current departs isoelectric baseline and
then returns?
Monophasic - Direct current
Biphasic - Alternating current
What is monophasic vs biphasic?
Electrical charges are equal above and below the baseline where there is zero net
charge. A balanced waveform doesn't have to be symmetrical.
What is a balanced waveform?
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