What are the different types of Capacitive probes?

How can we increase the kinetic energy of electronics emitted from surface of a metal ?

Subject : Electrical Engineering

A ferromagnetic ring has a uniform cross-sectional area of 2000 mm2 and a mean circumference of 1000 mm. A hysteresis loop obtained for the specimen is plotted to scales of 10 mm = 0.1 T and 10 mm = 400A/m and is found to have an area of 104 mm2. Determine the hysteresis loss at a frequency of 80 Hz

if we have 50 tooth, the number of poles is 4, the armature radius is 25 cm and the axial length is 40 cm then the tooth pitch is equal to ----. mentioned

3) A toroid with a coil of N= 100 turns is composed of three ferromagnetic materials: Material a is nickel-iron alloy with mean arc length la = 0.40 m, Material b is silicon steel with mean arc length h = 0.25 m, and Material c is cast iron with mean arc length le= 0.20 m. Each material has a cross-sectional area of 2 cm?. The corresponding data from the magnetization curve of each material are shown below. H (At/m) Nickel- Silicon Cast В (Т) iron alloy steel iron I 0.5 8.5 70.5 260.1 0.6 10.1 77.2 270.3 0.7 15.5 88.0 284.0 N turns 0.8 20.6 100 290.0 If the toroid has a current of I and a net magnetic flux of 1.4x104 Wb, find the value of I. What are the values of the relative permeability of Material b and the reluctance of Material c?

EXERCISES 1. A 2,250-turn coil is uniformly wound over the non-magnetic core of a toroid whose average diameter is 6 in., and cross sectional area is 0.65 sq in. Calculate the inductance of the toroid.

Describe the main advantage of GTO over thyristor.