how can sensitivity of potentiometer be increased
Sensitivity of potentiometer means the degree of response whenever there is a change in the input signal. It depends upon the following factors:
1. Resistance of the wire,
2. Number of turns in the wire. More the number of turns more sensitivity of the potentiometer.
3. Increasing the length of the wire.
1. Increasing length of potentiometer wire
2. Decrease the potential gradient by reducing the current and increasing the resistance in the potentiometer wire using a rheostat.
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When a steady current passes thru a wire of uniform cross-sectional area, the potential difference across the portion of the wire is directly proportional to the length of the portion.
V=IR => V=(I.rho.l)/A => V is directly proportional to l.
To increase the sensitivity, increase the potential difference and decrease the length...