Which is NOT a variable resistor?a.Potentiometerb.Rheostatc.Trimmersd.None of the above
Question
Which is NOT a variable resistor?
a. Potentiometer
b. Rheostat
c. Trimmers
d. None of the above
Solution
d. None of the above
Explanation: All the options given (Potentiometer, Rheostat, and Trimmers) are types of variable resistors.
a. A Potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.
b. A Rheostat is a variable resistor which is used to control the current flowing in a circuit.
c. Trimmers are miniature adjustable electrical components, they are meant to be set correctly when installed in some device, and never seen or adjusted by the device's user.
So, none of the options given are NOT a variable resistor.
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