Power Systems
A fuse wire of circular cross-section has a radius of 0.8 mm. The wire blows off at an current of 8 Amp. Calculate the radius of wire that will blow off at an current of 1 amp?

 0.4 mm.
  0.2 mm.
 4 mm.
 2 mm.

ANSWER DOWNLOAD EXAMIANS APP

Power Systems
The skin effect shows that

 the distribution of AC current is uniform through the cross section of the conductor
 current density is more at the surface of the condutor
 current density is more at the centre of the condutor
 current density is lower at the surface of the condutor

ANSWER DOWNLOAD EXAMIANS APP