Questions
When a galvanometer is shunted with a 6 ohm resistance, the deflection is reduced to one third. If the galvanometer is further shunted with a resistance of 3 ohm, the deflection is reduced to (relative to first reading)
detailed solution
Correct option is C
shunt s=Gn-1 G is the galvanometer resistance and n is no of tmes range is amplified first tme 6= G3-1 G=12 when further shunted by 3 ohms equivalent shunt becomes 6 x36+3=2 again 2=12n-1 n=7Talk to our academic expert!
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The ammeter has range 1 ampere without shunt. The range can be varied by using different shunt resistances. The graph between shunt resistance and range will have the nature
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