How do you calculate potentiometer resistance?
To calculate internal resistance, we use a potentiometer to first calculate the voltage across the battery, with no current through it. Then we attach a resistor in parallel to the battery and recalculate the voltage across it. Since the current flows, this time the balancing length is smaller.
How do you find the voltage of a potentiometer?
Measure the total battery voltage, and then measure the voltage between the same two points on the potentiometer (wiper and negative side). Divide the potentiometer’s measured output voltage by the measured total voltage.
How is potentiometer wattage calculated?
Imax = √(P/R) where Imax is the maximum amount of current that can pass safely through any part of the pot, P is the specified power rating of the pot, and R is the specified resistance of the pot. For example, a 10,000-ohm, 1-watt potentiometer can safely pass √[1/(1 x 104)] amperes, or 10 milliamperes.
What is the range of a potentiometer?
Potentiometers with R = 10Ω have 0-10Ω range. It’s always from 0 to nominal R (+/- tolerance). Typical potentiometer (and other basic electronic parts) values are defined in IEC 60063. There are few number series – E6 and E12 are very common.
What size potentiometer do I need?
A potentiometer does you no good if it covers a range of zero ohms to 100 ohms but you need it to operate up to 1000 ohms. Conversely, if you need to make adjustments of 10 ohms, you’ll find a range of 1,000 ohms too coarse to adjust.
Can I use a potentiometer as a light dimmer?
Yes, a potentiometer can be used as a light dimmer. There are many different circuit configurations that a potentiometer can function as a light dimmer.
What is the range of a 10k ohm potentiometer?
BOURNS Rotary Potentiometer, Guitar, 10 kohm, 1 Turns, Linear, 200 mW, ± 20%, PDB181 Series
| Track Resistance | 10kohm |
|---|---|
| Track Taper | Linear |
| Power Rating | 200mW |
| Resistance Tolerance | ± 20% |
| Product Range | PDB181 Series |