In a potentiometer experiment, if the wire is made of a material with higher resistivity, what will be the effect on the potential gradient?
Correct Answer: Potential gradient will decrease.
- Step 1: Understand what resistivity means. Resistivity is a property of a material that affects how easily electricity can flow through it.
- Step 2: Know that a wire with higher resistivity means it has more resistance to the flow of electricity.
- Step 3: Remember that in a potentiometer, the potential gradient is the change in voltage per unit length of the wire.
- Step 4: Realize that if the wire has higher resistance, it will allow less current to flow for the same applied voltage.
- Step 5: Understand that a lower current means that the voltage drop across the wire will be less for the same length of wire.
- Step 6: Conclude that since the voltage drop is less, the potential gradient (voltage drop per unit length) will decrease.
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