Questions

D.C series motor both armature and feild connected in series at noload condition current drawn by the motor is zero Ia=0 flux also zero. but very small amount of flux avalible because of residual magnetism

in series motor speed  =  N α Eb/Φ Eb almost conistant

                                 =    N α 1/Φ

At no load condition d.c series can be run as dangerously very high so d.c series motor
operated at load condition only

In june 1950, in South Korea

From the history,

The Erie Canal was completed in 1800's

The signing of the Declaration of Independence in 1776 and after that the American Revolution was started in the same 1776.

The Iroquios Confederacy was formed early when the Europeans first began comonizing, may be early in 1600's.

So, from the above data of history, Iroquois tribes formed the Iroquois Confederacy was the event that occured first among the options.

Rig veda   =  ayurveda

Yajur veda =  dhanurvedha

Samavedha  =  gandharvavedha

Atharvaveda  =  shilpa veda