Question

while performing an experiment by using a given voltmeter a student observed that the needle indicates 12 division on the voltmeter scale if the water metre scale has 5 division between 0 and 1 volt then what is the value of corresponding to 12 divisions

Answer 1

Least count of any device of measurement is the least reading it can take or measured by the device. 

Thus, LC = Value in n divisions/ n