Electronics - Resistance and Power - Discussion

36. 

How many connections does a rheostat have?

[A]. 1
[B]. 2
[C]. 3
[D]. 4

Answer: Option B

Explanation:

No answer description available for this question.

Thapar said: (Jul 22, 2012)  
The most common way to vary the resistance in a circuit is to use a rheostat, a two-terminal variable resistor. For low-power applications (less than about 1 watt) a three-terminal potentiometer is often used, with one terminal unconnected or connected to the wiper.

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