The Potentiometer-Internal resistance of a cell
 1) The resistance offered by the electrolyte between the two electrodes of the cell is: E.M.F of the cell Sensitivity of the cell The internal resistance of the cell Potential difference of the cell

 2) What is the shape of graph between internal resistance in X axis and external resistance in Y axis? Curve Parabola Straight line Hyperbola

 3) Which material is suitable for potentiometer wire? Manganin and constantan Copper Manganin constantan

 4) Which one of the following is a scalar quantity? current Time Potential difference Voltage

 5) What happens to the internal resistance of a cell when we increase the external resistance? Decreases Increases First increase then decrease First decrease then increase

 6) What is the device used to measure the potential difference? Voltmeter Metre bridge Potentiometer Galvanometer

 7) What is potential gradient? Fall of potential per unit voltage Fall of current per unit voltage Fall of potential per unit length Fall of current per unit length

 8) Why is a potentiometer preferred to a voltmeter to measure voltage in a circuit? Range of voltmeter is small compared to a potentiometer. No current is drawn by potentiometer during measurement. Potentiometer is cheaper. Potentiometer is handy compared to a voltmeter to measure voltage in a circuit.

 9) Which of the following is an example for secondary cell? Leclanche cell Dry cell Daniel cell Lead accumulator

 10) What is an example for a primary cell? Daniel cell All of these Leclanche cell Dry cell

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