Physics Exercises/Circuits

  1. How does the change in resistance of an incandescent lamp and the thermal inertia of the filament affect its reactance?
  2. A simple lead-acid battery charger consists of a variable transformer, rectifier, moving coil ammeter and a fuse. Why the fuse blows well before the current, according to the ammeter, reaches the rated value of the fuse.
Last modified on 17 July 2009, at 19:35