Current Electricity

Question

Wheatstone bridge principle is used to measure the specific resistance … of given wire, having length …, radius …. If … is the resistance of wire, then specific resistance is ; …. If the length of the wire gets doubled then the value of specific resistance will be :

Accepted Answer

Option D. The specific resistance (or resistivity) of a material is a fundamental property that describes how much the material resists the flow of electric current. The resistivity is typically denoted by the symbol … (rho), and it can be calculated by using the resistance … of a uniform specimen of the material, along with its physical dimensions. In the case of a wire, the resistivity formula in terms of its resistance …, length …, and cross-sectional area … is given by:

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Current Electricity

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