Table of Contents
- 1 How can we increase potentiometer sensitivity?
- 2 How can the sensitivity of a potentiometer be reduced?
- 3 How can the sensitivity of potentiometer be increased why it is better to use potentiometer over voltmeter?
- 4 Which potentiometer is more sensitive?
- 5 What is sensitivity of potentiometer?
- 6 Which is more sensitive potentiometer or meter bridge?
How can we increase potentiometer sensitivity?
Sensitivity of potentiometer can be increased by increasing the length of the potentiometer wire and by reducing the current in the circuit by using a rheostat. Both the methods help in decreasing the potential gradient, and thereby increasing the resistivity.
How can the sensitivity of a potentiometer be reduced?
This can be done by two ways:
- by increasing the length of potentiometer wire.
- if the potentiometer wire is of fixed length, the potentiometer gradient can be decreased by reducing the current in the potentiometer wire circuit with the help of rheostat and using a single cell.
How will the sensitivity of a potentiometer change with increase in current?
When the current flowing through the wire increases, then sensitivity of a potentiometer will increase by increasing the number of wires and decreasing the value of potential gradient.
How can we increase the sensitivity of a potentiometer Mcq?
The sensitivity of a potentiometer can be increased by-
- decreasing the thickness of the potentiometer wire.
- increasing the length of the potentiometer wire.
- increasing the temperature of the surrounding.
- all of the above.
How can the sensitivity of potentiometer be increased why it is better to use potentiometer over voltmeter?
The standardization of potentiometer can be done directly with a standard cell. This is highly sensitive so can be used to measure small emf’s. For more accuracy the length of potentiometer wire can be increased according to requirement. It does not draw any current from the circuit in which it is used for measurement.
Which potentiometer is more sensitive?
(ii) A potentiometer is called sensitive if fall of potential per unit length i.e potential gradient is small. The slope of V-l graph gives potential gradient which is smaller for the potentiometer B than for potentiometer A. Hence, potentiometer B is more sensitive than A.
How do you increase the sensitivity of a meter bridge?
The sensitivity of the metre bridge can be increased by increasing the current flow through the galvanometer. This is done by reducing the resistance by a particular factor.
How does sensitivity of potentiometer vary with potential gradient?
The sensitivity of a potentiometer is inversely proportional to its potential gradient. With an increase in the series resistance of the wire, the potential gradient of the wire decreases which in turn helps us to measure the emf more accurately.
What is sensitivity of potentiometer?
Sensitivity of a potentiometer is the smallest potential difference it can measure. The sensitivity of the potentiometer depends upon the value of potential gradient k. Smaller value of k, smaller the potential difference that a potentiometer can measure and more is the sensitivity of the potentiometer.
Which is more sensitive potentiometer or meter bridge?
It helps in the comparison of emf of two cells along with a potential difference that forms between 2 points in a given electric circuit. However, it has been found that the accuracy is greater in a potentiometer because of the use of longer length of resistance wire.
How do you increase the sensitivity of a Wheatstone bridge?
The sensitivity of the galvanometer itself is decreased if the resistance of the galvanotmeter G is too low. Therefore, we have to increase the sensitivity by increasing n and decreasing m. In the ideal case, if n = ∞ and m = 0.