Sensing-Electricity Questions Help

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The discussion centers on two main electrical engineering questions regarding solar panels and thermistors. The first question involves determining the configuration of 720 solar cells to achieve a total emf of 15V, requiring calculations to find the values of x (series connections) and y (parallel connections). The second question seeks to derive an equation for the voltage across a resistor in a potential divider circuit with a thermistor, dependent on the resistor's value and the thermistor's resistance. Participants are encouraged to share their attempts at solving these problems for better guidance. The thread emphasizes collaboration and problem-solving in electrical concepts.
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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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