1996

Physics Current Electricity Level: High School

Two scales on a voltmeter measure voltage up to 20.0 and 30.0 V , respectively . The resistance connected in a series with the galvanometer is 1680 Ohm for the 20 V scale , and 2930 Ohm for the 30 V scale . Determine the coil resistance and the full scale current of the galvanometer that is used in the voltmeter .