How will you convert 1mA full scale deflection galvanometer of resistance 100ohm into an ammeter to read 1A (full scale deflection) and into a voltmeter to read 1V full scale deflection
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Explanation:
When the galvanometer is at full scale, the voltage across it is V = I × R = 1ma × 100 ohms = 100mV. If we want to set full scale to be 1A, we have to shunt the meter with a resistor to take 999mA while the meter takes 1mA so the total is the 1A. The resistor needed will have 100mV across it and 999mA through it.
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