ln a balanced wheat stone bridge, current in the galvanometer is zero. It remains zero when:
1)battery emf is increased
2)all resistances are increased by 10 ohms
3)all resistances are made five times
4)the battery and the galvanometer are interchanged

Question

ln a balanced wheat stone bridge, current in the galvanometer is zero. It remains zero when:

1)battery emf is increased

2)all resistances are increased by 10 ohms
3)all resistances are made five times
4)the battery and the galvanometer are interchanged

G1 Physics · Accepted Answer

Treat an ideal voltmeter as open circuit and an ideal ammeter as zero resistance; for galvanometer conversion use the standard series/shunt resistance relations. The result matches C ((1), (3) and (4) are correct).

ln a balanced wheat stone bridge, current in the galvanometer is zero. It remains zero when: 1)battery emf is increased 2)all resistances are increased by 10 ohms 3)all resistances are made five times 4)the battery and the galvanometer are interchanged