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There are several technologies, one is a wire with resistance that is wound loosly around a toroidal core (in the shape of a donut) and a contact sweeping along the surface makes electrical connection with different numbers of turns as it rotates around the "donut" thus giving variable resistance.
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What might variable resistors be used for in a cinema?
Variable resistors in a cinema may be used to adjust the volume of the speakers, control the intensity of lighting in different areas, or regulate the speed of the projector fan.
Why do you use a variable resistor?
The characteristics of some circuit components cannot be predicted with complete accuracy. Variable resistors are provided in circuits involving these components sometimes to make up for these unavoidable variations.Variable resistors are often used to make it possible for users set suitable volumes in headphones and speakers.Variable resistors may be used to set time constants in circuits that also include capacitive or inductive elements.
How do resistors work in an electrical circuit?
Resistors work in an electrical circuit by limiting the flow of electric current. They are designed to resist the flow of electricity, which helps control the amount of current passing through a circuit. This resistance is measured in ohms and can be adjusted by changing the value of the resistor.
How parallel resistors work?
Resistors in parallel work just like highway lanes in parallel. -- The more lanes there are, the more traffic they can carry. -- Any number of lanes in parallel are always wider than the widest single lane, and can carry more traffic than the widest single lane can. "wide lane" = low resistance "narrow lane" = "high resistance" "traffic" = "electric current"
How do resistors work to limit the flow of electric current in a circuit?
Resistors work by impeding the flow of electric current in a circuit. They do this by resisting the flow of electrons, which reduces the amount of current that can pass through them. This restriction helps to control the amount of current in the circuit, which can be important for protecting components or controlling the overall function of the circuit.
Where are variable resistors found?
dimmer swithces for lights usually contain variable resistors
Give ten appliances with variable resistors?
toaster have variable resistot
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
List three variable resistor and list three fixed resistors?
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What might variable resistors be used for in a cinema?
Variable resistors in a cinema may be used to adjust the volume of the speakers, control the intensity of lighting in different areas, or regulate the speed of the projector fan.
What components are placed in an electrical circuit to control the amount of resistance in circuit?
resistors, variable potentiometers
Do potentiometers have polarity?
no there is no consideration of positive or negative legs in case of resistor.
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.
Difference between variable and fixed resistor?
Variable resistors means that a resistor which can change its resistance by control by any person or it self and fixed resistor means that it can not change its value.
What are two uses for variable resistors?
Volume Control Light Dimmer Tone Control Bass Control Treble Control Fan Speed Control
What are the 3 kinds of variable resistors?
by getting hoy and having a native harass a young pool stick with a slab of meat
