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## Which device is used to regulate the current?

Galvanometer. Hint: The instrument rheostat is a variable resistor that is used to control current. Moreover it is used in circuits to change the resistance of the circuit i.e. it is able to vary the resistance in the circuit without any interruption.

## What is a rheostat and how does it work?

Rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit. The rheostat can adjust generator characteristics, dim lights, and start or control the speed of motors.

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## What is a rheostat symbol?

The zigzag lines with three terminals represent the American standard symbol of rheostat and the rectangular box with three terminals represents the international standard symbol of rheostat.

## What is the variable resistance?

A variable resistor is a resistor of which the electric resistance value can be adjusted. When only two terminals are used, it functions as a variable resistance and is called a rheostat. Electronically controlled variable resistors exist, which can be controlled electronically instead of by mechanical action.

## What is the difference between alternate current and direct current?

Alternating Current (AC) is a type of electrical current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycles. Direct current (DC) is electrical current which flows consistently in one direction.

## Does the current depend on the length of the conductor?

In short, no, current is not affected by the length of conductor (well, in the real world at least).

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## What is difference between resistor and rheostat?

As nouns the difference between resistor and rheostat is that resistor is one who resists, especially a person who fights against an occupying army while rheostat is an electrical resistor, with two terminals, whose resistance is continuously variable by moving a knob or slider.

## What is variable resistance answer in one word?

Sports medicine A resistance that changes over the ROM when an isotomic contraction is used to move a load.

## What is variable resistance in one word?

a component used to change the current without changing the voltage source ( potential difference is fixed throughout) is called a variable resistance. rheostat is the device used for variable resistance.

## How does a circuit regulate voltage and current?

For lower load resistances the circuit regulates the output current to ~98uA. The circuit draws about 200uA from the 5V supply, in addition to the load current of 0~100uA. The Ohm’s Law police will come after you if you attempt to regulate both voltage and current into a fixed load.

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## What happens if you try to reduce voltage?

The Ohm’s Law police will come after you if you attempt to regulate both voltage and current into a fixed load. Unless you have a very unusual load, the load will draw whatever current it needs if you supply the correct voltage. Any attempt to reduce the current will reduce the applied voltage.

## How does a circuit limit current without dropping voltage?

For lower load resistances the circuit regulates the output current to ~98uA. The circuit draws about 200uA from the 5V supply, in addition to the load current of 0~100uA. Are you sure about your calculations? Voltage divider (R2, R3) gives 238mV at non-inverting input of opamp thus it allows 238uA through 1k resistor (R1).

## Which is the best regulator for low voltage?

Basic Low Voltage Regulator (VOUT = 2 to 7 Volts). (Figure 4 of datasheet). The simplest solution is NCh JFET with gate shorted to source. Here are some choices, which require ESD precautions and reverse voltage failure.