The load resistor is basically a resistive load. So the load resistor is not different from a normal resistor as it is used as a load to the output of the circuit, that is why it is called a Load Resistor.
What is difference between resistance and load resistance?
Resistance is just an proportionality constant (ohm’s law) it is the electrical inertia of a ckt. the resistance of your circuit is defined by the resistor you have placed and internal resistances of your components. where as load resistance is which draws the power from the circuit.
What is load resistance formula?
It is denoted as p. R=pXL/A. For DC circuit, Load resistance simply depends on the material composition of load, for example a DC light bulb contains Nichrome wire and it determines its resistance and to calculate it, you’ll need only that formula from above.
What is difference between load resistance and internal resistance?
Load resistance = the total resistance of the components in an external electric circuit. Internal resistance = the resistance within the power source that resists current flow.
How is load resistance measured?
Measure the voltage drop across the new resistor, then use Ohm’s law to calculate the current. This same current is flowing through the original resistor, so after you measure the voltage drop across the original resistor, you can use Ohm’s law to calculate its resistance.
What is load resistance in Thevenin’s theorem?
The Thevenin/Norton resistance is the resistor that comprises the resistance of the Thevenin/Norton. The load resistance is what connects to the two terminals of the equivalent circuit (i.e. directly between nodes “A” and “B”).
What’s the difference between load and resistor?
Resistor observes the flow of current and emits in the form of heat. But the load is something which is utilising the current flow through the circuit and working as per the application. Load resistance is still a resistance. ” load is something which is utilising the current flow”.
Why load resistance is used in Rectifier?
Load resistors are used for impedance matching, maximum power transfer, to improve output stability and to ensure a minimum of current flow. in switching power supplies, they are essential for the proper operation of the psu.
What is a load in an electric circuit?
An electrical load is simply any component of a circuit that consumes power or energy. In a household setting, the most obvious examples of electrical loads include light bulbs and appliances.
What is the value of load resistance?
Therefore the value of load resistance is 73.33 Ω. Maximum Power transfer theorem- In an electrical circuit to obtain maximum power from a source with a finite internal resistance, the resistance of the load must equal the resistance of the source as viewed from its output terminals.
What is minimum load resistance?
The minimum load is usually the highest resistance that draws the least current from the supply. When the minimum load conditions are not met, the power supply may experience some instability such as flickering and shutdowns. The minimum load for resistive load can be calculated if the minimum current is known.
How does load resistance affect gain?
Any load resistance appears in parallel with the collector resistance, so the voltage gain drops proportionally.
What is internal resistance in physics?
Internal resistance refers to the opposition to the flow of current offered by the cells and batteries themselves resulting in the generation of heat. Internal resistance is measured in Ohms. The relationship between internal resistance (r) and emf (e) of cell s given by. e = I (r + R)
Does load resistance include internal resistance?
A cell can be thought of as a source of electromotive force (EMF) with a resistor connected in series . When a load resistance is connected, current flows through the cell and a voltage develops across the internal resistance.
What is EMF and internal resistance?
EMF=The rate at which energy is drawn from this so use when. unit current flows through circuit or device meas used in volts. Internal resistance of a cell. =when electricity flows round a circuit the internal resistance of. the cell itself resists the flow of current in the cell itself .
What is the unit of load resistance?
Load Resistance Defined At the most basic level, load resistance is the cumulative resistance of a circuit, as seen by the voltage, current, or power source driving that circuit. This includes the resistance of the wires and the resistance of any devices connected to those wires.
What is load current formula?
For a three-phase generator, the full load current is calculated as I = 1000 × S / (√3 × V). Where, S is the generator rating in kilo-volt-ampere (kVA), and V is the generator rated voltage in volt (V). For a single-phase generator, the full load current is calculated as: I = 1000 × S / V.
How do you find the load resistor in a circuit?
What is Thevenin’s theorem in simple words?
Thevenin’s theorem states that it is possible to simplify any linear circuit, irrespective of how complex it is, to an equivalent circuit with a single voltage source and a series resistance.
Why is Thevenin theorem used?
Thévenin’s theorem can be used to convert any circuit’s sources and impedances to a Thévenin equivalent; use of the theorem may in some cases be more convenient than use of Kirchhoff’s circuit laws.
What is Thevenin’s voltage?
Thevenin equivalent voltage (Veq) is equal to the open-circuit voltage measured across two terminals of load. This value of the ideal voltage source is used in Thevenin equivalent circuit.
How does a load resistor affect voltage?
Show activity on this post. If you put a load (= a resistor) in parallel with the ‘lower’ resistor of your voltage divider the output voltage will indeed be lower.
What is the meaning of load current?
Load current in this context is simply the current thru the wire. As you say, a load consumes power. That power is delivered electrically, which means it is the product of voltage and current. The load current is just that current.
What is load resistance in half wave rectifier?
(In each case, input in an ac voltage) Circuit diagrams of these devices are not required. Q. In a half wave rectifier, the output is taken across a 90Ω load resistor. If the resistance of diode in forward biased condition is 10Ω, the efficiency of rectification of ac power into dc power is.
What is the use of load resistance in half wave rectifier?
In a half-wave rectifier circuit, the load resistance is connected in series with the PN junction diode. Alternating current is the input of the half-wave rectifier. A step-down transformer takes an input voltage and the resulting output of the transformer is given to the load resistor and to the diode.