# Circuit with NTC/Voltmeter/Ammeter

• ravsterphysics
The summary is: In summary, when the resistance of the NTC decreases, the total resistance of the circuit decreases, resulting in an increase in current. This leads to a decrease in the PD across X and an increase in the PD across Y.
ravsterphysics

## The Attempt at a Solution

Since resistance of the NTC falls we can say that the total resistance of the circuit has decreased so there is now more current in the circuit, so it's definitely answer B or D.

And since X's resistance has fallen, PD across X will decrease too (because even though current has increased, the drop in resistance is bigger than the increase in current??)

And since there is more current in the circuit, the pd of Y will increase??

ravsterphysics said:

## Homework Statement

View attachment 111592

## The Attempt at a Solution

Since resistance of the NTC falls we can say that the total resistance of the circuit has decreased so there is now more current in the circuit, so it's definitely answer B or D.

And since X's resistance has fallen, PD across X will decrease too (because even though current has increased, the drop in resistance is bigger than the increase in current??)

And since there is more current in the circuit, the pd of Y will increase??
Right.

ravsterphysics

## What is an NTC?

An NTC (Negative Temperature Coefficient) is a type of thermistor that has a resistance that decreases as the temperature increases. It is commonly used in circuits to measure temperature changes.

## What is the purpose of a voltmeter in a circuit?

A voltmeter is used to measure the voltage difference between two points in a circuit. It is commonly used to troubleshoot and analyze the performance of a circuit.

## What is the function of an ammeter in a circuit?

An ammeter is used to measure the electric current flowing through a circuit. It is often used to monitor the amount of current being drawn by a specific component or to ensure that the circuit is functioning properly.

## What is the difference between a voltmeter and an ammeter?

A voltmeter measures the voltage difference in a circuit, while an ammeter measures the electric current flowing through the circuit. They are both important tools in analyzing and troubleshooting circuits, but they serve different purposes.

## How do you connect an NTC, voltmeter, and ammeter in a circuit?

The NTC should be connected in series with the voltmeter, and the voltmeter should be connected in parallel with the ammeter. The NTC is typically placed near the component being measured, while the voltmeter and ammeter are placed at different points in the circuit to measure voltage and current, respectively.

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