TS EAMCET · Physics · Magnetic Effects of Current
A galvanometer coil has a resistance of and the meter shows full scale deflection for a current of What resistance needs to be connected to convert the meter into a voltmeter of range to
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
To make the galvanometer as a voltmeter, we have to connect a series shunt resistance. V=iRG+Rs ⇒18=2×10-3×10+Rs ⇒18×10002=10+Rs ⇒9000=10+Rs ⇒Rs=9000-10=8990 Ω
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