Positive and negative charges: It is a device to measure Us history ch12 sec 1 notes difference. A conductor has a resistance of one ohm if a current of one ampere flows through it on applying a potential difference of one volt across its ends. It is defined as the resistance offered by a cube of a material of side 1 m when current flows perpendicular to its opposite faces.
It is the commercial unit of electrical energy. It is the total work done in maintaining an electric current in an electric circuit for given time. Factors on which resistance of a conductor depends: If any pdf file have any copyright voilation please inform us we shell remove that file from our website.
A substance that has infinitely high resistance does not allow electric current to flow through it. Electrical power is the rate at which electric energy is consumed by an appliance.
It is device to measure current in a circuit.
It is always connected in series in a circuit. The flow of electric charges across a cross-section of a conductor constitutes an electric current.
Static electricity deals with the electric charges at rest while the current electricity deals with the electric charges in motion.
Potential difference between two points: The resistance R of a conductor depends i Directly on its length L i. It is always connected in parallel to the component across which the potential difference is to be measured.
If a single resistance can replace the combination of resistances in such a manner that the current in Us history ch12 sec 1 notes circuit remains unchanged, then that single resistance is called the equivalent resistance.
Static and current electricities: The charge acquired by a glass rod when rubbed with silk is called positive charge and the charge acquired by an ebonite rod when rubbed with wool is called negative charge.
It is the S. A conductor offers very low resistance to the flow of current. One volt potential difference: Electrostatic potential at any point in an electric field is defined as the amount of work done in bringing a unit positive charge from infinity to that point.
Electrons, being negatively charged, move from lower to higher potential regions. The direction of conventional current is opposite to that of the negatively charged electrons.
One coulomb is defined as that amount of charge which repels an equal and similar charge with a force of 9 x N when placed in vacuum at a distance of 1 meter from it. One kilowatt hour is the electric energy consumed by an appliance of watts when used for one hour.
The Potential difference between two points in an electric field is the amount of work done in bringing a unit positive charge from one to another. It is the region around a charged body within which its influence can be experienced. Laws of resistances in series: It is a property of a conductor by virtue of which it opposes the flow of current through it.
It is defined as the rate of flow of the electric charge through any section of a conductor. Positive charges move from higher to lower potential regions. This law states that the current passing through a conductor is directly proportional to the potential difference cross its ends, provided the physical conditions like temperature, density etc.
The Potential difference between two points in an electric field is said to one volt if one joule of work has to be done in bringing a positive charge of one coulomb from one point to another.
It is device to detect current in an electric circuit. It is equal to the ratio of the potential difference applied across its ends and the current flowing through it.AP World History, Amsco Chapter 1, From Hunter-Foragers to Settled billsimas.com Chapter 2: The First Civilizations Chapter 2, Period 1, The First billsimas.com Spanish-American War worksheet (Ch.
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