Range

A microammeter has a resistance of 100W and a full scale range of 50 µA. It can be used as a voltmeter or a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination(s). (1) 10V range with 200 kW resistance in series. (2) 50V range with 10 kW resistance in series. (3) 5 mA range with 1W resistance in parallel. (4) 10 mA range with 1 kW resistance in parallel.

A microammeter has a resistance of 100W and a full scale range of 50 µA. It can be used as a voltmeter or a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination(s). (1) 10V range with 200 kW resistance in series. (2) 50V range with 10 kW resistance in series. (3) 5 mA range with 1W resistance in parallel. (4) 10 mA range with 1 kW resistance in parallel.

What is meant by sound ranging ? Give one use of sound ranging,