How position of balance point in potentiometer get affected if (i) current in the potentiometer be increased, (ii) length of the potentiometer wire be doubles?

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The position of the balance point in a potentiometer is the point where the potential drop across the unknown resistor is equal to the potential drop across the known resistor. It depends on the current flowing through the potentiometer wire, the length of the wire, and the resistance of the wire.

(i) If the current in the potentiometer is increased, the potential gradient of the wire will also increase. This will cause the potential drop per unit length of the wire to increase, and the balance point will move closer to the cell.

(ii) If the length of the potentiometer wire is doubled, the potential drop per unit length of the wire will decrease by half. This means that the potential difference across each unit length of the wire will be half of what it was before. Therefore, the balance point will move away from the cell, as the potential drop across the known resistor will remain constant, while the potential drop across the unknown resistor will decrease due to the increased length of the wire.

Balance point in potentiometer

Balance Point in Potentiometer

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How position of balance point in potentiometer get affected if (i) current in the potentiometer be increased, (ii) length of the potentiometer wire be doubles?

CBSE CLASS XII Related Questions

1.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

2.
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3.
Write any two features of nuclear forces.

5.
Suppose a pure Si crystal has \( 5 \times 10^{28} \) atoms per \( \text{m}^3 \). It is doped with \( 5 \times 10^{22} \) atoms per \( \text{m}^3 \) of Arsenic. Calculate majority and minority carrier concentration in the doped silicon. (Given: \( n_i = 1.5 \times 10^{16} \, \text{m}^{-3} \))

6.
Draw a circuit diagram of a full-wave rectifier using p-n junction diodes. Explain its working and show the input-output waveforms.

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How position of balance point in potentiometer get affected if (i) current in the potentiometer be increased, (ii) length of the potentiometer wire be doubles?

CBSE CLASS XII Related Questions

1. Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

2.Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

3. Write any two features of nuclear forces.

5.Suppose a pure Si crystal has \( 5 \times 10^{28} \) atoms per \( \text{m}^3 \). It is doped with \( 5 \times 10^{22} \) atoms per \( \text{m}^3 \) of Arsenic. Calculate majority and minority carrier concentration in the doped silicon. (Given: \( n_i = 1.5 \times 10^{16} \, \text{m}^{-3} \))

6.Draw a circuit diagram of a full-wave rectifier using p-n junction diodes. Explain its working and show the input-output waveforms.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Draw the number of scattered particles versus the scattering angle graph for scattering of alpha particles by a thin foil. Write two important conclusions that can be drawn from this plot.

2.
Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

3.
Write any two features of nuclear forces.

5.
Suppose a pure Si crystal has \( 5 \times 10^{28} \) atoms per \( \text{m}^3 \). It is doped with \( 5 \times 10^{22} \) atoms per \( \text{m}^3 \) of Arsenic. Calculate majority and minority carrier concentration in the doped silicon. (Given: \( n_i = 1.5 \times 10^{16} \, \text{m}^{-3} \))

6.
Draw a circuit diagram of a full-wave rectifier using p-n junction diodes. Explain its working and show the input-output waveforms.