How Do You Find The Minimum Load Resistance?

What is the formula for calculating load?

real power (KW)+ reactive power (KVAR) = Apparent power (KVA).

This is not the conventional addition, these are vectors on the imaginary plane.

to calculate load you will use the formula P=IV where P is the total apparent power.

If you know what the voltage is and the current then you know P, there is your KVA..

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.

Why is load resistance used?

Load resistors are used for impedance matching, maximum power transfer, to improve output stability, and to ensure a minimum of current circulation. In switching power supplies, they are essential to ensure the correct PSU operation.

What is the difference between resistance and internal resistance?

Internal resistance is the resistance within a battery, or other voltage source, that causes a drop in the source voltage when there is a current. … External resistance or simply called Resistance is generally referred as the opposition to the flow of current offered by any load.

What is the load?

noun. anything put in or on something for conveyance or transportation; freight; cargo: The truck carried a load of watermelons. the quantity that can be or usually is carried at one time, as in a cart. … a great quantity or number: loads of fun; loads of people. the charge for a firearm.

What is internal resistance formula?

Internal resistance is measured in Ohms. … The relationship between internal resistance (r) and emf (e) of cell s given by. e = I (r + R) Where, e = EMF i.e. electromotive force (Volts), I = current (A), R = Load resistance, and r is the internal resistance of cell measured in ohms.

What is Thevenin’s resistance?

The Thevenin resistance is the resistance looking back from AB with V1 replaced by a short circuit.

What is load current formula?

Full Load current calculation Single-phase Motor: Single-phase motor full load current I is equal to power P divided by the power factor times of line to neutral voltage. P = V * I * Cos pi. Full load current I = P / (V x Cos pi) Amps. V= Voltage +/- 10 % in Volts. I= Full load current in Amps.

How do you find Thevenin resistance?

Find the Thevenin resistance by removing all power sources in the original circuit (voltage sources shorted and current sources open) and calculating total resistance between the open connection points. Draw the Thevenin equivalent circuit, with the Thevenin voltage source in series with the Thevenin resistance.

How do you calculate load resistance?

Use Ohm’s Law to determine the total resistance. The following formula is used to determine the total resistance in a circuit when both current and voltage are known: R = V / I, where R = Resistance, V = Voltage, and I = Current.

What is minimum power?

This theory predicts that the most likely coalition to form in a group will be one that wins but comprises the individuals with the smallest amounts of power consistent with this outcome. …

What is the difference between resistance and load?

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 the resistance of a load?

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. … Everything between the “place where the current goes out” and “the place where the current comes in” contributes to load resistance.

For what value of load resistance the load current is maximum?

In our Thevenin equivalent circuit above, the maximum power transfer theorem states that “the maximum amount of power will be dissipated in the load resistance if it is equal in value to the Thevenin or Norton source resistance of the network supplying the power“.