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Hello masum79. Welcome to PF !masum79 said:
How did you get +2V?masum79 said:
What is the voltage drop across (either) 300 Ω resistor?masum79 said:
DUH !CWatters said:
A basic circuit is a complete and closed path that electricity flows through. It typically consists of a power source, such as a battery, wires, and one or more components, such as resistors, capacitors, and light bulbs.
To solve a basic circuit question, you will need to use the principles of Ohm's law and Kirchhoff's laws. First, identify the components in the circuit and their values. Then, use Ohm's law (V=IR) to calculate the voltage, current, or resistance at different points in the circuit. Finally, use Kirchhoff's laws to determine the total voltage and current in the circuit.
Ohm's law states that the voltage across a resistor is directly proportional to the current flowing through it, and the constant of proportionality is the resistance of the resistor. Mathematically, it can be written as V=IR, where V is voltage (measured in volts), I is current (measured in amperes), and R is resistance (measured in ohms).
Kirchhoff's laws are two fundamental principles that govern the behavior of electric circuits. The first law, also known as Kirchhoff's current law, states that the sum of currents entering a junction in a circuit is equal to the sum of currents leaving the junction. The second law, known as Kirchhoff's voltage law, states that the sum of voltages around a closed loop in a circuit is equal to zero.
Some common mistakes when solving basic circuit questions include not correctly identifying the components in the circuit, using incorrect values for resistors or other components, and not following the correct order of operations when applying Ohm's law and Kirchhoff's laws. It is also important to pay attention to the direction of current flow and to properly label the circuit diagram.
