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What advantage does the potentiometer method have over the fixed resistor method for voltage dividing?
Wiki User
∙ 10y ago
Resistors with precise resistances _could_ be used in the voltage divider to assure a precise voltage. However, these are more expensive. The same results can be achieved using a potentiometer because it can be adjusted to allow for minor imperfections in it.
Wiki User
∙ 10y ago
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How much power is consumed through a 3 amp?
-- If the 3 Amp is being drawn from a battery,then the battery is supplying3 x (Voltage of the battery) watts.-- If the 3 Amp is flowing through a resistor,then the resistor is dissipating9 x (Resistance of the resistor) watts.
Why the capacitor time period formula is given as t equals RC?
-- The quantity 'RC' has the physical dimensions of Time. -- If the capacitor is charging through a resistor, then 'RC' is the time it takes to charge up to (1 - 1/e) of the voltage it still has to go to become fully-charged. -- If the capacitor is discharging through a resistor, then 'RC' is the time it takes to discharge to 1/e of its present voltage. -- ' e ' is the base of natural logarithms, approximately 2.71828... -- 'RC' is called the 'time constant' of the resistor/capacitor combination.
What is x y recorder and explain its working principle advantages disadvantages and applications?
Operating Principle: In x-y recorder, an emf plotted as a function of another emf, this is done by having 1 cell balancing potentiometer controlling the position of paper provided while another cell balancing potentiometer control the position of recording pen.
Why the limiting resistors are need in 7-segment display?
Each light-emitting segment is nothing but an LED, which is electrically similar toany other diode. Once the forward voltage exceeds something around 1.7 volts,the resistance of the diode becomes very verysmall. At any higher voltage, itwould literally appear as a "short" circuit, without a separate series limiting resistor.
What is the main difference between HT and LT Lines?
It's the voltage: HT high voltage LT low voltage Tension = voltage (French?)
What is a potentionmeter?
a potentiometer is a varible resistor use as a voltage provider.
Why is a voltmeter used rather than a potentiometer?
A potentiometer is a variable resistor, while a voltmeter is a device that measures voltage.
What do you call the variable resistor when it is set up to alter the size of the voltage over the resistor?
A potentiometer.
Is a potentiometer and voltage regulator the same thing?
No. A potentiometer is a variable resistor that allows you to set a voltage ratio or to adjust a resistance in a circuit. A voltage regulator, on the other hand, is a device that responds to changes in load, making automatic correction of output voltage. If you increase the load on a potentiometer, the output voltage will change, but not so (within limits) for a voltage regulator. However, you can use a potentiometer in a voltage regulator to make the output adjustable.
What is linearisation of potentiometer?
Linearization of the potentiometer refers to the inclination of the three parts of a potentiometer. The parts includes a pot, is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.
What is advantages and disadvantage of potentiometer?
Potentiators works well as a voltage resistor or variable resistor. It is often used for volume controls on a radio, but they can be cumbersome.
What is the name of a variable resistor with 3 terminals?
It's called a 'variable resistor'. However, it can function as a 'rheostat' (to control current) when two terminals are connected, or as a 'potentiometer' (to control voltage) when three terminals are connected. The terms, 'rheostat' and 'potentiometer' do not describe the device itself, but how it is being used.
Why do you measure emf with a potentiometer not with voltmeter?
EMF (E''electromotive Force'') is another term for Volts, hence the E in electronic formulas and EMF is measured with a volt meter. A potentiometer is not a meter at all, it is a variable resistor
What is the function of rheostat in this experiment?
A rheostat is the name given to a variable resistor when it is used to control current. When a variable resistor is used to control voltage, we call it a potentiometer.A rheostat is connected in series with a load, and two of its three terminals are used. A potentiometer is connected in parallel with the supply, and each of its three terminals are used.So the terms 'rheostat' and 'potentiometer' are the names given to describe the function of a variable resistor, not the variable resistor itself.
How do you compute resistor?
The resistance in a circuit is calculated by dividing the voltage by the current (R=V/I) (Ohm's Law).
How can a potentiometer be a rheostat?
A rheostat and a potentiometer are two different applications for the same device, a variable resistor. These devices have three terminals. Two terminals are connected across the complete resistor, while the third terminal is connected to a controllable wiper. The variable resistance is provided between the wiper terminal and either one of the other two terminals.When used to control current, it is called a rheostat. When used to control voltage, it is called a potentiometer.
How control voltage system work?
Sometimes abbreviated to CV, a control voltage is a continuous electrical signal used to manipulate the values of components in an analog circuit... Instead, the pedal is connected to a potentiometer, which acts as a variable resistor providing a circuit for the voltage inside the keyboard.
