A resistive circuit is a type of electrical circuit that contains only resistive elements, such as resistors, and operates based on Ohm's law. It allows the flow of current and voltage to be controlled and manipulated through various connections and components.
In a series circuit, the total resistance is equal to the sum of all the individual resistances. This can be calculated by adding up all the resistor values in ohms. For example, if a circuit has three resistors with values of 10 ohms, 20 ohms, and 30 ohms, the total resistance would be 60 ohms (10 + 20 + 30 = 60).
In a series circuit, the components are connected in a single loop, so the current flows through each component in a sequential manner. In a parallel circuit, the components are connected in multiple branches, so the current is divided among them. This means that the total resistance in a parallel circuit is less than the resistance of any individual component, while in a series circuit, the total resistance is equal to the sum of all the individual resistances.
The voltage drop across a resistor can be calculated using Ohm's law, which states that voltage is equal to current multiplied by resistance (V=IR). So, if you know the current flowing through a resistor and its resistance value, you can calculate the voltage drop. For example, if a resistor has a value of 10 ohms and the current flowing through it is 2 amps, the voltage drop would be 20 volts (V = 2 x 10).
A Wheatstone bridge is a type of circuit that is used to measure an unknown electrical resistance. It consists of four resistors arranged in a diamond shape, with the unknown resistor connected between two of the resistors. By measuring the voltage across the unknown resistor and using the known values of the other resistors, the unknown resistance can be calculated. Wheatstone bridges are commonly used in electronic circuits for precise resistance measurements.