PMMC instrument

Which of the following is NOT an advantage of PMMC instruments?

• Low power consumption

• High accuracy

• Measure both AC and DC

• Linear or uniform scale

How can a PMMC instrument be adapted to measure alternating current (AC)?

• By connecting a rectifier circuit

• By increasing the coil resistance

• By increasing the strength of the magnets

• By reducing the air gap

What material is typically used for the moving coil in a PMMC instrument?

• Copper

• Alluminium

• Iron

• Steel

What type of damping is used in PMMC instruments?

• Air friction damping

• Fluid friction damping

• None

• Eddy current damping

PMMC instruments are best suited for measuring:

• High-frequency AC signals

• Only DC signals

• Low frequency AC signal

• Both AC and DC