What is the unit of potential-gradient ? If the potential gradient along the potentiometer wire be decreased, will the zero-deflection position be obtained at longer length or shorter length ?
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Unit of potential gradient is `V cm^(-1)` or `V m^(-1)`. Since fall of potetential, `V = K l` where K is the potential gradient, therefore, for the given value of V, if K is decreased, l will increase.
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