OJEE Potentiometer — practice questions
7 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice OJEE Potentiometer in the app →The **potential gradient** $K$ along a uniform potentiometer wire is defined as:An **ideal voltmeter** measuring a potential difference should have:Two cells are compared using a potentiometer. The null lengths are $\ell_1 = 360$ cm for cell 1 and $\ell_2 = A potentiometer wire of length 4 m has a potential gradient $K = 0.5$ V/m. The EMF of a cell that balances at A potentiometer compares the EMFs of two cells. Cell 1 with $\varepsilon_1 = 1.5$ V gives a null length 75 cm.A potentiometer wire of length 10 m carries a steady current. EMF $\varepsilon_1$ balances at 6 m; the same ceTwo cells of EMF $\varepsilon_1$ and $\varepsilon_2$ ($\varepsilon_1 > \varepsilon_2$) connected so that **lik