Specification questions Flashcards
What is current and its formula
Current is the rate of flow of charged particles
Thew equation is : I=Q/T
What is resistance
Resistance can be defined by the equation R=V/I
But in terms of the theory behind resistance, it is the property of a conductor to resist the flow of electrons that are flowing through it.
Is resistance constant when there is a constant temperature? Include ohms law
For certain components, such as metal resistors at a constant temperature, the resistance, R, doesn’t change. These components obey Ohm’s Law.
What is Ohm’s Law
Ohm’s Law states that the current through a metallic conductor is proportional to the potential difference across it if the temperature remains constant.
Explain the conservation of charge
The law of conservation of charge states that electric charge can neither be created nor destroyed. In a closed system, the amount of charge remains the same. When something changes its charge it doesn’t create charge but transfers it.
How is charge transferred
If one object gives up electrons, another object gains those electrons. There are three methods by which charges can be transferred to build up static electricity: charging by friction, by conduction, and by induction.
Is the distribution of current in a circuit is a consequence of charge conservation and if so how?
Yes it is. As Q=IT the current will be conserved also because of the conservation of charge.
Is the distribution of potential differences in a circuit is a
consequence of energy conservation and if so how?
Yes
What happens to the resistance of a filament lamp as the temperature is increased?
The resistance is also increased
What is a diode
It is a semiconductor device with two terminals most importantly it typically allows the flow of current in one direction only.
