What are the advantages of a potentiometer?

Potentiometer works on the method of zero deflection so that the possibility of error is extremely small. It is a highly sensitive device, therefore it can measure small EMFs.

A standard cell can be used to standardize a potentiometer.
As per the requirement, the length of the potentiometer can be increased in order to get an accurate value.
The potentiometer does not draw any current from the circuit in which it is used.

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CBSE CLASS XII Related Questions

1.
In a region, the electric potential varies as \(V = 10 - 50x\), where \(V\) is in volts and \(x\) is in meters. The electric field in the region is
- \(10\ \text{N/C}\) along \(+x\)
- \(10\ \text{N/C}\) along \(-x\)
- \(50\ \text{N/C}\) along \(+x\)
- \(50\ \text{N/C}\) along \(-x\)
View Solution
2.
A magnet held vertically, with its north pole down, is dropped along the axis of a closed solenoid placed vertically on a table. If the observer looks down from the top,
- the induced current will flow in the anticlockwise direction.
- the induced current will flow in the clockwise direction.
- no induced current will flow in the solenoid.
- the magnet will fall with a constant velocity.
View Solution
3.
Two point charges -Q and Q are located at points (d, 0) and (0, d) respectively, in x-y plane. The electric field E at the origin will be:
- \(\frac{1}{4\pi\epsilon_0} \frac{\sqrt{2}Q}{d^2} (\hat{i} - \hat{j})\)
- \(\frac{1}{4\pi\epsilon_0} \frac{\sqrt{2}Q}{d^2} (-\hat{i} - \hat{j})\)
- \(\frac{1}{4\pi\epsilon_0} \frac{Q}{d^2} (\hat{i} - \hat{j})\)
- \(\frac{1}{4\pi\epsilon_0} \frac{Q}{d^2} (-\hat{i} - \hat{j})\)
View Solution
4.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?
- \( (M_x - M_z)<M_y \)
- \( (M_x - M_y)<M_z \)
- \( M_x>(M_y + M_z) \)
- \( M_x<(M_y + M_z) \)
View Solution
5.
An electron is revolving around a proton in a circular orbit of radius $r$. Using classical physics, prove that the ratio of value of the angular momentum and the value of magnetic moment of electron revolving in the orbit is a constant.
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6.
A ray of light MN is incident normally on the face corresponding with side AB of a prism with an isosceles right-angled triangular base ABC. Trace the path of the ray as it passes through the prism when the refractive index of the prism material is (i) $\sqrt{2}$, and (ii) $\sqrt{3}$.
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