Comparison between MC and MI Instruments
S.No
|
M.C
Instruments
|
M.I
Instruments
|
1
|
More accurate
|
Less accurate
|
2
|
Costly
|
cheap
|
3
|
Uniform scale
|
Non-uniform scale
(scale cramped at beginning and finishing)
|
4
|
Very sensitive
|
Robust in
construction
|
5
|
Low power
consumption
|
Slightly high
power consumption
|
6
|
Eddy current
damping is used
|
Air friction
damping is used
|
7
|
Can be used only
for D.C
|
Can be used on A.C
as well as on D.C
|
8
|
Controlling torque
is provided by spring
|
Controlling torque
is provided by gravity or spring
|
9
|
θ α I
|
θ α I2
|
10
|
Errors are set due
to aging of control springs, permanent magnet (i.e. No Hysteresis loss)
|
Errors are set due
to hysteresis and stray fields (i.e. hysteresis loss takes place).
|
nice
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