hello,
answer is potentiometer.
as a voltmeter draws some current in cell it can not givethe accurate rating. a potentiometer is the best option as during the measurement by potentiometer no current flows through it.
hope it would help.
Question : Match the columns.
Option 1: i-a, ii-c, iii-b, iv-d
Option 2: i-b, ii-a, iii-d, iv-c
Option 3: i-b, ii-a, iii-c, iv-d
Option 4: i-a, ii-b, iii-c, iv-d
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