What is difference between balanced force and unbalanced force?
Force can be of two types: Balanced force. Unbalanced force….What are the examples of Unbalanced Force?
| Balanced forces | Unbalanced forces |
|---|---|
| Opposite in direction. | Can be in any direction but opposite. |
| Does not cause any change in the state of motion of the object. | Causes change in the state of motion of the object. |
How do you determine the balance point of a potentiometer?
the emf of the battery in the primary circuit is equal to the emf of the experimental cell in the secondary circuit. the potential differences of the wire between the +ve end and jockey becomes equal to the emf of the experimental cell.
What will happen if the cell and galvanometer are interchanged in physics?
If the galvanometer and the cell are interchanged then the balance point remains unchanged. Hence, the galvanometer will not show any current and there will be null deflection. Was this answer helpful?
On what principle does the potentiometer work?
Principle of operation The principle of a potentiometer is that the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length. The potentiometer is a simple device used to measure the electrical potentials(or compare the e.m.f of a cell).
What is the resistance of potentiometer in its balanced condition?
2.
Why current does not flow in potentiometer?
3 Answers. The potential difference and the emf of the battery are trying to push current in opposite directions. When they are equal, neither is stronger than the other, so there is no current. If two points are at the same potential and a conductor is connected between them no current will flow.
Why is a 10 wire potentiometer more sensitive than a 4 wire?
As the length increases, the potential decrement per unit length will become less and hence accuracy increases which makes it more sensitive. So ten wire potentiometer is more sensitive than a four-wire one.
How can we increase sensitivity of potentiometer?
Increasing the length of the potentiometer wire. By reducing the current in the circuit by using a rheostat.
Which is better potentiometer or voltmeter?
The potentiometer is preferred over voltmeter when there is a measurement of emf of the cell because the potentiometer does not draw any current as it is a null device. This is the reason why potentiometer is preferred over voltmeter in order to get the actual measurement of emf.
Why is 10 Wire potentiometer?
The reason is because with increasing length the potential drop per unit length of wire decreases. So now potentiometer can measure very small changes in potential across the same wire for same applied electric current.