Quick Answer: What Is The Function Of Load Resistance?

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 load resistance in a circuit?

The load resistance in a circuit is the effective resistance of all of the circuit elements excluding the emf source. In energy terms, it can be used to determine the energy delivered to the load by electrical transmission and there appearing as internal energy to raise the temperature of the resistor.

What is meant by load current?

Current load is the amount of electrical current that is passed from a power source to the device or appliance receiving the power. … When a device which requires power needs to pull more current from the power source than the source is able to provide, a short circuit typically occurs.

What is the relationship between a load and resistance in an electrical circuit?

Ohm’s law defines the relationship between the voltage, current, and resistance in an electric circuit: i = v/r. The current is directly proportional to the voltage and inversely proportional to the resistance.

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.

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.

How do you calculate load 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 the difference between load and resistance?

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”.

Is a fan a resistive load?

Lightbulbs, toasters, electric hot water heaters, and so on are resistive loads. … All electrical loads that have a coil of wire to produce the magnetic field are called inductive loads. Examples of inductive loads are fans, vacuum cleaners, and many other motorized devices.

What is the use of load?

Load affects the performance of circuits with respect to output voltages or currents, such as in sensors, voltage sources, and amplifiers. Mains power outlets provide an easy example: they supply power at constant voltage, with electrical appliances connected to the power circuit collectively making up the load.

Is resistance a load?

Load resistance is also a resistance, but it has a very specific meaning in the context of electric circuits; it is the resistance connected between the output stage of a circuit, and the ground. … So the load resistance of each stage of a circuit becomes the input resistance of the next stage.

What happens if a circuit has no resistance?

If there really were no resistance in the circuit, the electrons would go around the circuit, and arrive back at the beginning of the circuit with as much energy as the potential difference (the voltage). That final energy is usually what is dissipated as heat or other types of energy by the circuit.

Is load equal to force?

Force is a measure of the interaction between bodies. … Force is known as a vector quantity, as it has both direction and magnitude. Load. Load is a term frequently used in engineering to mean the force exerted on a surface or body.

Does a circuit need a load?

The only reason to make electricity flow is to give it some work to do. This process of electricity doing work in a circuit is called load. Without having a load, or some work for electricity to do, then there is no point in having a circuit.

What is the use of load resistance?

The load resistance in a circuit is the effective resistance of all of the circuit elements excluding the emf source. In energy terms, it can be used to determine the energy delivered to the load by electrical transmission and there appearing as internal energy to raise the temperature of the resistor.

Why do we use resistance?

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

What are four factors that determine resistance?

There are 4 different factors which affect resistance:The type of material of which the resistor is made.The length of the resistor.The thickness of the resistor.The temperature of the conductor.

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 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.

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 causes high resistance?

Resistance measurements are normally taken to indicate the condition of a component or a circuit. The higher the resistance, the lower the current flow. If abnormally high, one possible cause (among many) could be damaged conductors due to burning or corrosion. … The lower the resistance, the higher the current flow.