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What is the formula for resistance in terms of resistivity (ρ), length (L), and area (A)?
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R = ρL/A
What is the approximate value of thermal velocity of electrons?
10^5 meters/second
Define drift velocity in the context of current electricity.
Drift velocity is the average velocity of electrons moving through a conductor due to an electric field.
What formula represents electric current?
I = Q/T
What is the relationship between current density (J) and current (I)?
J = I/A
State Kirchhoff’s Junction Rule.
The sum of currents entering a junction equals the sum of currents leaving the junction.
What is Ohm's Law and its formula?
Ohm's Law states that V = IR, where V is voltage, I is current, and R is resistance.
What does EMF stand for and what does it signify?
EMF stands for Electromotive Force, and it represents the potential difference of a battery during charging and discharging.
How does electron movement inside a conductor relate to the direction of the current?
Electrons move in the opposite direction to the current.
What are the two types of current described in the notes?
Instantaneous Current and Average Current
Explain Kirchhoff’s Loop Rule.
The sum of potential differences around any closed loop in a circuit is always zero.
How does temperature affect the resistance of a conductor?
Temperature can cause an increase or decrease in the resistance depending on the material of the conductor.
What is the significance of the video and how should it be used in preparation?
The video is detailed and interesting and should be used along with practicing questions and referring to question papers from the past 10 years for comprehensive understanding.
What is current density, and how is it related to current flow through a conductor?
Current density is the amount of electrical current flowing per unit area through a conductor, and it is given by J = I/A.
What is the balance condition of a Wheatstone Bridge?
r1/r2 = r3/r4
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