Question

The phenomena of ‘creeping’ occurs in:

• A. Ammeters
• B. Voltmeters
• C. Wattmeters
• D. Watt-hour meters

Hint:

Remember: \textbf{Creeping occurs in wattmeters}, especially induction-type ones. It's a no-load disc rotation issue.

Answer 1

The Correct Option is C

The phenomenon of creeping is observed in energy meters or wattmeters, particularly those of the induction type.
Creeping refers to the slow and continuous rotation of the meter's disc even when there is no load connected to the meter.
This can cause the meter to record energy usage even though no power is being consumed.
Common reasons for creeping include: stray magnetic fields, over-voltage, or improper friction compensation.
To prevent this, manufacturers often provide holes or slots in the disc, or place shading bands to suppress unnecessary disc movement.
Hence, wattmeters are the instruments where this phenomenon is typically observed.