Sensing-Electricity Questions Help

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SUMMARY

The discussion focuses on two key electrical engineering problems involving solar panels and thermistors. The first problem requires determining the configuration of 720 solar cells to achieve an electromotive force (emf) of 15V by arranging the cells in series and parallel. The second problem involves deriving an equation for the voltage across a resistor in a potential divider circuit with a thermistor, powered by a 5V supply. Participants are encouraged to share their attempts to solve these problems for more effective guidance.

PREREQUISITES
  • Understanding of series and parallel circuits
  • Knowledge of electromotive force (emf) calculations
  • Familiarity with thermistors and potential divider circuits
  • Basic electrical engineering principles
NEXT STEPS
  • Calculate series and parallel configurations for solar cells to achieve desired voltage
  • Explore thermistor characteristics and their impact on voltage in potential dividers
  • Learn about Ohm's Law and its application in circuit analysis
  • Investigate practical applications of solar panels in remote power systems
USEFUL FOR

Electrical engineering students, hobbyists working with solar technology, and anyone interested in circuit design and analysis involving thermistors and solar panels.

123Sub-Zero
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I am struggling on the following questions and require help. Please reply as soon as possible.
1.720 cells are connected together to form a solar panel to power a remote telephone. The individual cells are connected in a grid of x cells in series and then these series lines joined in parallel with each other forming y parallel lines. What are the values of x and y to give an emf of 15V and using all 720 cells?
2.A thermistor is set up in a potential divider with a resistor R across a 5v power supply. A voltage is taken across the resistor R. Derive an equation for how this voltage depends on the value of R, the 5V and RTH
Thanks in advance!
 
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If you show us how you tried to solve your problems and where you are getting stuck, we can attempt to steer you in a successful direction.
I recommend seeing this https://www.physicsforums.com/showthread.php?t=94379
 

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