A moving-coil galvanometer which gives a full-scale on deflection with 0.005A is converted to a voltmeter reading up to 5V using an external resistance of 975\(\Omega\). What is the resistance of the metre?
a
0.25\(\Omega\)
b
2.50\(\Omega\)
c
25.00\(\Omega\)
d
250.00\(\Omega\)
Explanation
Correct Option
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kaunaubagiji
4 years ago
R= V/Ig - r
v= 5v, Ig= 0.005 r= 975
R= (5/0.005) - 975
R= 1000 - 975
R= 25 ohms
