The potentiometer connected as a rheostat in Figure 4 is used to… The potentiometer connected as a rheostat in Figure 4 is used to control the current to a heating element. When the rheostat is adjusted to a value of 8Ơor less, the heating ele- ment can burn out. What is the rated value of the fuse needed to protect the circuit if the voltage across the heating element at the point of maximum current is 100 V and the volt- age across the rheostat is the difference between the heating element voltage and the source voltage?Engineering & TechnologyElectrical Engineering TECH 101
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