Current Electricity Charging Discharging Of Capacitors Question 251
Question: A voltmeter of resistance $ 1000,\Omega $ gives full scale deflection when a current of 100 mA flow through it. The shunt resistance required across it to enable it to be used as an ammeter reading 1 A at full scale deflection is
[SCRA 1994]
Options:
A) $ 10000,\Omega $
B) $ 9000,\Omega $
C) $ 222,\Omega $
D) $ 111,\Omega $
Show Answer
Answer:
Correct Answer: D
Solution:
By using $ \frac{i}{i _{g}}=1+\frac{G}{S} $
Therefore $ \frac{i}{100\times {{10}^{-3}}}=1+\frac{1000}{S} $
Therefore $ S=\frac{1000}{9}=111,\Omega $
BETA
