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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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∙ 13y ago
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What might variable resistors be used for in a cinema?
dimmers in cinemas or rooms
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.
Who invented resistors?
Otis f.boykin invented resistors
Work done by a variable force?
A variable force is that force whose magnitude, direction both change as it acts.
How do you draw this you have three 20 ohm resistors available. how would you connect these three resistors to produce a 30 ohm equivalent you must use all three resistors?
2 in parallel (= 10 ohms) and the third in series.
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
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 components are placed in an electrical circuit to control the amount of resistance in circuit?
resistors, variable potentiometers
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
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.
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
