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Volume Control

Light Dimmer

Tone Control

Bass Control

Treble Control

Fan Speed Control

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15y ago
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14y ago

Resistors limit the flow of electrical current in a circuit.

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Q: What are two uses for variable resistors?
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Where are variable resistors found?

dimmer swithces for lights usually contain variable resistors


What is the difference between normal resistance and potentiometer?

Resistors are either fixed value, or variable. A variable resistor has three terminals; one at either end and one attached to a moving 'wiper', and can be connected either as a potentiometer or as a rheostat. So 'potentiometers' and a 'rheostats' are different applications for variable resistors. A potentiometer uses all three terminals, and is used to control levels of potential; whereas a rheostat uses just two of the three terminals, and is used to control current.


Give ten appliances with variable resistors?

toaster have variable resistot


What is the advantages of variable resistor?

When we want to regulate somthing ;we use variable resistors for example :volume control in radios and volume in headset. Also , the variable resistors can forms a potential devider in which the overall resistance between the two end points remain the same,but the ratio of the two resistors in the legs changes.so the variable resistor is affectively a potential divider. Also, the variable resistor can forms a potential divider in which the overall resistance between the two end points remains the same, but the ratio of the two resistors in the legs changes. So, the variable resistor is effectively a potential divider.


What are photo resistors?

photo resistors, or light dependent resistors, are devices with variable resistance, that cahnges depending on how much light is hitting the device


Can variable resistors store electrical charge?

NO. Variable capacitory can store a small charge


What might variable resistors be used for in a cinema?

dimmers in cinemas or rooms


List three variable resistor and list three fixed resistors?

mmg


What products use resistors?

allmost every electronic devices uses resistors..(it is needed in all circuits)


Two resistors are connected in parallel to a battery What must the votlage across these two resistors?

Both resistors will have the voltage of the battery.


What picture represents two resistors wired in parallel?

It represents that two resistors are connected in parallel.


What components are placed in an electrical circuit to control the amount of resistance in circuit?

resistors, variable potentiometers