Help - Electrical Current vs Water temperature

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SUMMARY

The discussion focuses on determining the relationship between electrical current and water temperature using a heating coil, specifically Nichrome. The key equation provided is VIt = mc(T2-T1), where V is voltage, I is current, t is time, m is mass, c is specific heat capacity, T2 is final temperature, and T1 is initial temperature. The setup involves a DC power pack, variable resistor, and digital ammeter to measure current, emphasizing the importance of measuring voltage for accurate predictions. This equation is essential for conducting a practical investigation in NCEA Level 3 Physics.

PREREQUISITES
  • Understanding of specific heat capacity of water
  • Familiarity with electrical concepts such as voltage and current
  • Basic knowledge of experimental physics and heat transfer
  • Experience with using a digital ammeter for current measurement
NEXT STEPS
  • Research the specific heat capacity of water and its implications in thermal experiments
  • Learn about the properties and applications of Nichrome as a heating element
  • Explore the principles of heat balance in thermodynamic systems
  • Investigate methods for accurately measuring voltage in electrical circuits
USEFUL FOR

Students in NCEA Level 3 Physics, educators teaching thermal dynamics, and anyone conducting experiments involving electrical heating and temperature measurement.

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Homework Statement



I am currently working on a practical investigation for my NCEA Level 3 (new zealand qualification equivalent of 7th form) Physics class and one of the requirements is to provide a suitable equation for theoretical comparison

Basically the experiment is the effects of Electrical current on water temperature through use of a heating coil (most likely Nichrome) i was wondering if anyone had such an equation.
at the moment my setup is simple with a DC powerpack and variable resistor (+ digital ammeter for measurement) to change the current going to the heating coil. I assume the equation will include the specific heat capacity of water etc and i was wondering what equation i could use to accurately predict the temperature in an ideal set-up (and preferably a description of such a setup)

Thanks in advance
 
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Normally if you apply a heat balance and you time for how long you heat the water for you will get

VIt = mc(T2-T1)

So you will need to measure voltage as well.

(Normally that setup is used to determine the value of the specific heat capacity c)
 

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