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प्रश्न
State the underlying principle of a potentiometer ?
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उत्तर
Principle of potentiometer: When a steady current flows through it, the potential difference across a uniform wire is directly proportional to the length of the part across which the potential is measured.
संबंधित प्रश्न
State the principle of working of a potentiometer.
Would you prefer a voltmeter or a potentiometer to measure the emf of a battery?
A potentiometer wire has a length of 1.5 m and a resistance of 10 Ω. It is connected in series with the cell of emf 4 Volt and internal resistance 5 Ω. Calculate the potential drop per centimeter of the wire.
In a potentiometer circuit, a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs?
Potential difference between the points A and B in the circuit shown is 16 V, then potential difference across 2Ω resistor is ______ V. volt. (VA > VB)
A Daniel cell is balanced on 125 cm lengths of a potentiometer wire. Now the cell is short circuited by a resistance 2 Ω and the balance is obtained at 100 cm. The internal resistance of the Daniel cell is ______.
In balanced meter bridge, the resistance of bridge wire is 0.1 Ω cm. Unknown resistance X is connected in left gap and 6 Ω in right gap, null point divides the wire in the ratio 2:3. Find the current drawn from the battery of 5 V having negligible resistance.
What is the effect of decreasing the current through the potentiometer on the null point?
State dimension of potential gradient.
Draw neat labelled diagram of potentiometer as voltage divider.
