Electrical Mach...

A 4 pole lap wound shunt generator has field and armature resistances of 50 ohm and 0.1 ohm respectively sixty 100 V, 40 W bulbs are being lit by the generator.

A six pole 250 V dc shunt generator is supplying full load current at a speed of 1000 rpm. Its armature and filed resistance are 0.04 Ω and 100 Ω respectively and it has 700 lap connected conductors. The voltage across armature resistance 7.2 V. the value of load current and flux per pole are

A 10 kW, 1440 rpm dc shunt generator has resistance loss of 400 watts in its field winding under normal operating conditions. The time constant of the field winding is 0.2 second. The energy stored in the magnetic field produced by the field winding is ___________ (in Joules)

A 230V, 10 kW dc shunt generator has 1000 turns on each pole. At rated speed, a shunt field current of a 2 A produces no load voltage of 230 V, but at rated load a voltage of 230 V is produced by a field current of 3 A. The number of series field turns per pole required for long shunt connection, if it is made possible to maintain the load voltage constant without changing field current is

A 125 V, 12.5 kW shunt generator is driven by a 20hp motor to generate rated output. The armature circuit resistance is 0.1 Ω, and the field circuit resistance is 62.5 Ω. The rated variable electric loss is 1040 W. At rated power output, the armature current for maximum efficiency is__ (in A)

The percentage reduction in speed of a generator working with constant excitation on 500 V bus-bars to decrease its load from 500 to 250 kW. The armature resistance is 0.015 Ω. Effect of armature reaction can be neglected