Current Electricity and Electrical InstrumentHard
Question
When a galvanometer is shunted with a 4Ω resistance, the deflection is reduced to one - fifth. If the galvanometer is further shunted with a 2Ω wire, determine current in galvanometer now if initially current in galvanometer is I0 (given main current remain same) .
Options
A.I0/13
B.I0/5
C.I0/8
D.5I0/13
Solution
(I0 − 
) 4 = G ...(1)
(I0 − Ig)
= I0G ...(2)
from (1) and (2)
12Ig = I0 − Ig ⇒ Ig =
Ans
) 4 = G ...(1)(I0 − Ig)
= I0G ...(2)from (1) and (2)
12Ig = I0 − Ig ⇒ Ig =
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