Shared Flashcard Set

Details

102b
Mid-term Study
26
Medical
Professional
10/25/2011

Additional Medical Flashcards

 


 

Cards

Term
What is a conductor?
Definition
Anything that easily allows the flow of electrons.
Term
What is an insulator?
Definition
Anything that prevents the flow of electrons.
Term
What is current?
Definition
The flow of electrons.
Term
What is voltage?
Definition
A potential difference in charge.
Term
What is resistance?
Definition
The opposition to electron flow.
Term
What are the units for current and the abbreviation?
Definition
Amperes aka Amps expressed as "A".
Term
What are the units for voltage and the abbreviation?
Definition
Volts expressed as "E" but most commonly as "V"
Term
What are the units for resistance?
Definition
Resistance expressed with the Greek letter Omega, "Ω".
Term
What does the first stripe on a resistor signify?
Definition
The first number of the value.
Term
What does the second stripe on a resistor signify?
Definition
The second number of the value.
Term
What does the third stripe on a resistor signify?
Definition
The multiple.
Term
What is tolerance?
Definition
The accuracy or permitted variation in the measurement from stated value of a resistor.
Term
What is a series circuit?
Definition
A circuit with a single pathway.
Term
What is a parallel circuit?
Definition
A circuit with multiple pathways.
Term
How does resistance behave within a series circuit?
Definition

Rt=R1+R2+R3+...

 

If you add a resistor in series, overall resistance goes up.

Term
How does resistance behave within a parallel circuit?
Definition

Rp=1/(1/R1+1/R2+1/R3)

 

If you add a resistor in parallel, overall resistance goes down, due to the added pathway.

 

Term
How does voltage behave within a series circuit?
Definition

Vt=V1+V2+V3+...

 

The sum of all volate drops must equal the applied voltage. (Voltage gets divided/shared).

Term
How does voltage behave within a parallel circuit?
Definition
Voltage measured anywhere inside a parallel circuit is the same anywhere in the circuit.
Term
How does current behave within a series circuit?
Definition
Current measured anywhere in a series circuit is the same anywhere in the circuit.
Term
How does current behave within a parallel circuit?
Definition

It=I1+I2+I3+...

 

Current gets divided/shared

Term
Where should you place the test leads from the multimeter to get a resistor value?
Definition
You must stradle the resistor with no current.
Term
Where should you place the test leads from the multimeter to get a voltage value?
Definition
You must stradle the load with current.
Term
Where should you place the test leads from the multimeter to get a ampere value?
Definition
You must include the multimeter within the circuit.
Term
What is the equation for Ohm's Law?
Definition
E=IR
Term
What is the equation for the Voltage Divider?
Definition
Vx=(Rx/Rt)Vt
Term
What is the equation for the Current Divider?
Definition
Ix=(Rp/Rx)It
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