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Questions and Answers
What is the unit of charge (Q) in the context of electrical energy storage?
What is the unit of charge (Q) in the context of electrical energy storage?
- Volts
- Ohms
- Amps
- Coulombs (correct)
In a capacitor, what is the insulating layer separating the conducting plates called?
In a capacitor, what is the insulating layer separating the conducting plates called?
- Dielectric (correct)
- Conductor
- Resistor
- Inductor
According to Ohm's Law, what is the relationship between current (I), voltage (V), and resistance (R) in a conductor?
According to Ohm's Law, what is the relationship between current (I), voltage (V), and resistance (R) in a conductor?
- V = IR (correct)
- V = I/R
- I = V/R
- I = V+R
What effect does increasing the separation distance of separated charge (Q) have on voltage (V)?
What effect does increasing the separation distance of separated charge (Q) have on voltage (V)?
What is the ability of a capacitor to store charge measured in?
What is the ability of a capacitor to store charge measured in?
According to the relationship C ∝ A/D, if the distance (D) between plates remains constant, what happens to the capacitance (C) when the plate area (A) increases?
According to the relationship C ∝ A/D, if the distance (D) between plates remains constant, what happens to the capacitance (C) when the plate area (A) increases?
What effect does increasing the density of charge (Q) on the plates have on the voltage (V) across the capacitor?
What effect does increasing the density of charge (Q) on the plates have on the voltage (V) across the capacitor?
In the context of neuronal membranes, what creates a voltage across the membrane similar to an electronic capacitor?
In the context of neuronal membranes, what creates a voltage across the membrane similar to an electronic capacitor?
What is the relationship between charge (Q), voltage (V), and capacitance (C) expressed by the equation Q=CV?
What is the relationship between charge (Q), voltage (V), and capacitance (C) expressed by the equation Q=CV?
What is the purpose of selectively permeable ion channels in creating the resting membrane potential in neurons?
What is the purpose of selectively permeable ion channels in creating the resting membrane potential in neurons?
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Study Notes
Electrical Energy Storage
- The unit of charge (Q) is a fundamental concept in electrical energy storage.
Capacitor Structure
- The insulating layer separating the conducting plates in a capacitor is called the dielectric.
Ohm's Law
- The relationship between current (I), voltage (V), and resistance (R) in a conductor is I = V/R.
Capacitor Properties
- Increasing the separation distance of separated charge (Q) decreases the voltage (V).
- The ability of a capacitor to store charge is measured in capacitance (C).
- Capacitance (C) is directly proportional to the plate area (A) when the distance (D) between plates remains constant, as expressed by the equation C ∝ A/D.
- Increasing the plate area (A) while keeping the distance (D) constant increases the capacitance (C).
- Increasing the density of charge (Q) on the plates increases the voltage (V) across the capacitor.
Neuronal Membranes
- The separation of charge across the neuronal membrane creates a voltage similar to an electronic capacitor.
- Selectively permeable ion channels help create the resting membrane potential in neurons by regulating the flow of ions across the membrane.
Capacitance Equation
- The relationship between charge (Q), voltage (V), and capacitance (C) is expressed by the equation Q = CV.
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