The scale of a 0-500 V voltmeter is divided into ten large divisions representing 50 V each and each large division a further subdivided into 10 small divisions, each representing 5 V. It is used for measurement of out put vol t age of a potentiometer which can be varied from 0 to 500 V. It is observed that when the sliding contact moved from its zero position, there is no perceptible movement of pointer of the voltmeter till the sliding contact reaches a position where the output voltage should be 5 V. Therefore, it can be concluded that