Physics
A galvanometer can be converted into a voltmeter by connecting with it a

Low resistance on parallel
High resistance in parallel
Low resistance in series
High resistance on series

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Physics
Water pipes in hilly areas often burst on a cold frosty night, because

None of these
Water in the pipes freezes and on freezing water expands, so pipes break
The material of which pipes are made contracts due to cold and so breaks
Frost makes the pipes rusty, so they break

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