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lydigihome
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Homework Statement
[PLAIN]http://img208.imageshack.us/img208/4577/physicso.jpg
Homework Equations
The Attempt at a Solution
dont know how to do..
help please, how can i find that is 4V?
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lydigihome said:oh, some small amendment:
that 15ohm at the top righthand corner should be 10ohm
AC, or alternating current, is when the flow of electrons changes direction periodically. This type of current is commonly used in household appliances and power outlets. DC, or direct current, is when the flow of electrons only goes in one direction. This is commonly used in batteries and electronic devices.
A circuit is a path for electricity to flow. It consists of a power source, such as a battery, wires to carry the current, and a load, such as a light bulb. When the circuit is complete, the electrons flow from the negative terminal of the battery, through the wires, and into the load, where they power the device. The electrons then return to the positive terminal of the battery, completing the circuit.
Resistance is the measure of how difficult it is for electricity to flow through a material. Materials with high resistance, such as rubber or plastic, limit the flow of electrons, while materials with low resistance, such as metals, allow for a greater flow of electrons. As resistance increases, the current decreases.
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage and inversely proportional to the resistance. This means that as the voltage increases, the current also increases, and as the resistance increases, the current decreases.
The power in a circuit can be calculated by multiplying the voltage by the current. This is represented by the equation P=IV, where P is power in watts, I is current in amps, and V is voltage in volts. Power is the amount of energy being used by a circuit, and is measured in watts.