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It depends on what you mean by 'voltage'. For example, if you mean electromotive force (e.m.f.), then the internal resistance of a battery or generator will cause an internal voltage drop, resulting in the terminal voltage being lower than the open-circuit voltage and the greater the load, the lower the open-circuit voltage.
On the other hand, if you are asking 'how' do you reduce voltage, then there are various ways. For a.c. voltages, we can use a step-down transformer. For d.c. voltages, we can use a variable resistor connected as a potentiometer, or a pair of fixed-value resistors to form a voltage divider.
What else can I help you with?
Why are transformers used to increase the voltage before transmission?
Using a higher voltage reduces power losses during transmission.
What are the advantages of 750Kv high voltage?
A high voltage like 750kV is used in transmission lines because this reduces the current in the wires for a given amount of power. A reduced current will reduce the power lost in transmission (I^2R).CommentFar more importantly than reducing line losses, it reduces the voltage drop along the line which would, otherwise, be enormous!
What will happen if you use a 14 volt output in a 12 volt input?
Shouldn't be a problem. For example the unloaded voltage on a car battery is often around 14 Volts. Under load the voltage reduces.
Reducing voltage in a circuit does not affect resistance?
Reducing voltage in a circuit does not directly affect resistance. It affects current. Resistance is an independent variable.Ohm's law: voltage equals current times resistance.However, reducing voltage and/or current does reduce power, which reduces temperature, which can change resistance because resistance is usually affected to some degree by temperature.
How are current and voltage related to the power supplied by the source?
in ac circuits power,P=VICOS@ @ is the angle between voltage and current. in dc P=VI V is the voltage I is the current. Power (in Watts) is current (A) x voltage (V)
What in a substations reduces the transmission voltage levels?
Transformers.
What is a definition of grid station?
it is a station which reduces high voltage to low voltage and increases current.
What does a heater resistor do?
reduces the voltage available to the blower motor.
What does the instrument cluster voltage limiter do on a 1977 Dodge van?
It reduces the voltage from 12v to 6v because the gauges run on the lower voltage.
What is the effect of Rs and RL on the voltage gain of an amplifier?
it reduces the gain
Why are transformers used to increase the voltage before transmission?
Using a higher voltage reduces power losses during transmission.
A step down transform reduces the voltage to what for home use?
Answer for USA, Canada and countries running a 60 Hertz supply service.A step down transform reduces the voltage to 120/240 for home use.
What are the indications and causes of overloades generator?
The speed and terminal voltage drastically reduces
What are the indications and causes of an overload generators?
The speed and terminal voltage drastically reduces
What is the need of feeding low voltage supply for microprocessors?
because it reduces the power dissipation
What is volts drop?
the voltage drop means whenever the conductor passing through the supply voltage, according to the resistivity property to reduces the some amount of voltage that drop is known as voltage drop for example the resistance is used to drop the voltage to the circuit.............................................
Does a resistor reduce current or voltage in an electrical circuit?
A resistor reduces the flow of current in an electrical circuit, which in turn affects the voltage across the resistor.
