ISRO Scientist or Engineer Electrical 2014
For the following questions answer them individually
Two bulbs, one 250V, 100 W and second 250V, 25 W are connectedin series and 440V AC, 50Hzis applied across the two bulbs. Whichof the following will happen,
A wave form shown as Input is applied across primary of a pulse transformer which has 1 : 1 turns ratio. The output on the secondary side will be as shown in the Figure
The distribution system shown in Figure is to be protected by over current system of protection
For proper fault discrimination directional over current relays will be required at locations
A 50 Hz bar primary CT has a secondary with 500 turns. The secondary supplies 5 A current into a purely resistive burden of 1 Ω. The phase angle between the primary and
secondary current is
