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WorksheetsPMMC instrument
Total questions: 5
Worksheet time: 5mins
Name
Class
Date
1.
Which of the following is NOT an advantage of PMMC instruments?
a)
Low power consumption
b)
High accuracy
c)
Measure both AC and DC
d)
Linear or uniform scale
2.
How can a PMMC instrument be adapted to measure alternating current (AC)?
a)
By connecting a rectifier circuit
b)
By increasing the coil resistance
c)
By increasing the strength of the magnets
d)
By reducing the air gap
3.
What material is typically used for the moving coil in a PMMC instrument?
a)
Copper
b)
Alluminium
c)
Iron
d)
Steel
4.
What type of damping is used in PMMC instruments?
a)
Air friction damping
b)
Fluid friction damping
c)
None
d)
Eddy current damping
5.
PMMC instruments are best suited for measuring:
a)
High-frequency AC signals
b)
Only DC signals
c)
Low frequency AC signal
d)
Both AC and DC
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