SureDen
Potentiometer: A potentiometer is a device to measure an unknown emf or potential difference accurately.
Construction: a potentiom
Test Details
A battery with negligible internal resistance is connected with 10m long wire. A standard cell gets balanced on 600 cm length of this wire. On increasing the length of potentiometer wire by 2m then the null point will be displaced by
Test Details
The resistivity of a potentiometer wire is 40 ´ 10–8 ?m and its area of cross section is 8 ´ 10–6 m2. If 0.2 amp. Current is flowing through the wire, the potential gradient will be
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A deniel cell is balanced on 125 cm length of a potentiometer wire. When the cell is short circuited with a 2 ? resistance the balancing length obtained is 100 cm. Internal resistance of the cell will be
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A 2 volt battery, a 15 ? resistor and a potentiometer of 100 cm length, all are connected in series. If the resistance of potentiometer wire is 5 ?, then the potential gradient of the potentiometer wire is
Test Details
In an experiment to measure the internal resistance of a cell by potentiometer, it is found that the balance point is at a length of 2 m when the cell is shunted by a 5 ? resistance; and is at a length of 3 m when the cell is shunted by a 10 ? resistance. The internal resista
Test Details
In an experiment to measure the internal resistance of a cell by potentiometer, it is found that the balance point is at a length of 2 m when the cell is shunted by a 5 ? resistance; and is at a length of 3 m when the cell is shunted by a 10 ? resistance. The internal resista
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