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When work is mentioned in connection with electrical devices, we are quick to think of measures of energy such as joules, and measures of power such as watts. Here the usual terms needed to figure out the power easily, such as volts and amps or volts and path resistance, or current and path resistance are absent. Instead we have volts and also coulombs which effectively constitute a number of electrons passing from one terminal to the other of the battery. This is equivalent to considering a current flowing for a particular time. The relation is that charge is given by current times time. So a half Coulomb is the same as a half ampere-second. Given these more familiar terms, volts, amps, seconds, it looks rather easier to work the result, because the normal energy unit, the Joule, is equal to the current in amps times the voltage in volts times the time in seconds. So V x I x t = 12 x 0.5 = 6 joules. This can also be expressed as 6 watt.seconds This is the energy available to do work, in fact.
What else can I help you with?
What terminal does electrons flow from in a dry cell?
That is a good way to run the cell down quickly. Electrons are negatively charged so they always move from the positive terminal towards the negative. Each electron carries a charge of 1.602 x 10-19 coulombs so 1 coulomb (1 amp for 1 second) carries 6.24 x 1018 electrons.
What is the attraction that holds positive and negative atoms together?
Coulomb Forces
What are rules for electric charges attracting and repelling?
Like charges repel each other (positive-positive or negative-negative), while opposite charges attract (positive-negative or negative-positive). The strength of the force of attraction or repulsion between charges depends on their magnitudes and the distance between them, following Coulomb's law.
Is charge the measure of extra positive or negative particles in an object?
Yes, charge is the measure of extra positive or negative particles in an object. Objects with more electrons than protons have a negative charge, while objects with more protons than electrons have a positive charge. The unit of charge is the coulomb.
Will charges have no effect on each other?
Charges will affect each other through the electromagnetic force. Like charges (positive-positive or negative-negative) repel each other, while opposite charges (positive-negative) attract each other. This interaction is described by Coulomb's Law.
Which is bigger a coulomb or charge if an electron?
A coulomb is bigger. Please also note that a coulomb is defined as a POSITIVE charge, while an electron has a NEGATIVE charge. Anyway, the magnitude of a coulomb is much bigger than that of an electron.
Is it true that an electrons has a negative charge?
Electrons have a negative charge. Protons have a positive charge, and neutrons have a neutral charge. Added: Electrons always have a negative charge, value: minus 1.602*10-19 Coulomb.
What is the charge in 1 coulomb?
The amount of charge in 1 Coulomb is exactly 1 Coulomb of charge. That's true whether the charge is positive or negative.
How does a positive charge attract a negative charge?
The exchange particle for electromagnetic force is the photon. It carries the force. This force is mathematically described by Coulomb's Law.
Do positive charges repel negative charges?
Yes, positive charges repel negative charges due to the electrostatic force of attraction or repulsion between them. This force is described by Coulomb's Law and follows the principle that like charges repel each other.
What is the attraction or repulsion between charged particles?
Charged particles experience attraction if they have opposite charges (positive and negative) and repulsion if they have the same charge (positive-positive or negative-negative). This is governed by Coulomb's law, which states that the force between charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
The attraction or repulsion that unlike or like charges have?
The attraction or repulsion that unlike or like charges have is due to the electrostatic force. Like charges (positive-positive or negative-negative) repel each other, while unlike charges (positive-negative) attract each other. This force is governed by Coulomb's law and is responsible for the interactions between charged particles.
