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Q.

A series high resistance is preferable than shunt resistance in the galvanometer circuit of potentiometer. Because

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a

high resistances are easily available

b

shunt resistances are costly

c

shunt resistance damages the galvanometer

d

series resistance reduces the current through galvanometer in an unbalanced circuit

answer is C.

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Detailed Solution

A galvanometer is a very sensitive and low current device and when a high current is passed through it, it will burn out. To protect the galvanometer from burning we add a high resistance in series with the galvanometer.

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