Circuit with NTC/Voltmeter/Ammeter

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SUMMARY

The discussion focuses on the behavior of a circuit containing a Negative Temperature Coefficient (NTC) thermistor, a voltmeter, and an ammeter. As the resistance of the NTC decreases, the total resistance of the circuit also decreases, resulting in an increase in current. Consequently, the potential difference (PD) across component X decreases due to the larger drop in resistance compared to the increase in current, while the PD across component Y increases as the current rises. The conclusions drawn indicate that the answers to the circuit behavior questions are either B or D.

PREREQUISITES
  • Understanding of NTC thermistors and their characteristics
  • Basic knowledge of Ohm's Law and circuit analysis
  • Familiarity with measuring instruments like voltmeters and ammeters
  • Concept of potential difference and current relationships in circuits
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  • Study the characteristics and applications of NTC thermistors in circuits
  • Learn about Ohm's Law and its implications in circuit behavior
  • Explore the principles of measuring voltage and current with voltmeters and ammeters
  • Investigate the effects of varying resistance on current flow in electrical circuits
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Students studying electrical engineering, educators teaching circuit analysis, and hobbyists interested in electronics and thermistor applications.

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Homework Statement


1.JPG


Homework Equations

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??
 
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ravsterphysics said:

Homework Statement


View attachment 111592

Homework Equations

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.
 
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