An ammeter can be converted into a voltmeter by connectingA. a low resistance in seriesB. a high resistance in seriesC. a low resistance in parallelD. a high resistance in parallel

An ammeter can be converted into a voltmeter by connecting:

B. a high resistance in series

When an ammeter is connected in series with a circuit, it measures the current flowing through that part of the circuit. An ammeter typically has a very low resistance to minimize the voltage drop across it and ensure accurate current measurements.

On the other hand, a voltmeter is used to measure the potential difference (voltage) between two points in a circuit. To convert an ammeter into a voltmeter, you need to connect a high resistance in series with the ammeter. This additional high resistance will limit the current passing through the voltmeter, ensuring that it doesn't affect the original circuit significantly.

By connecting the high resistance in series, the ammeter will now measure the voltage drop across this resistance, which will be proportional to the voltage across the points where you want to measure the potential difference. Therefore, the ammeter effectively becomes a voltmeter with the appropriate scale calibrated based on the added resistance.