GATE EE case studies
GATE EE · Put your knowledge to work in context.
GATE Electrical Engineering (GATE EE) is a national-level entrance examination in India for admission to postgraduate engineering programmes and for recruitment by some public sector undertakings. This page is an independent study resource for candidates preparing for the EE paper; it is not affiliated with the organising institute or any official body. The GATE EE case studies are 5 cases and about 3,176 words.
1Bridge Reading That Disagrees with Calculation
A final-year lab group is characterizing an unbalanced Wheatstone bridge. The left divider across a regulated 10.00 V supply is R1 = 1.00 kΩ from the positive rail to node A and R2 = 2.00 kΩ from node A to ground.
475 words, about 2 min2DOL Start on a Weak 400 V Bus
A 15 kW, 400 V, 50 Hz, four-pole, star-connected squirrel-cage induction motor drives a loaded conveyor. At rated voltage the nameplate data give full-load slip 4.0%, full-load current 29 A, direct-on-line starting current 6.0 times full-load current, starting torque 1.5 times full-load torque, and breakdown torque 2.5 times full-load torque.
661 words, about 3 min3Capacitor Bank Sizing and a Hidden Resonance
An 11 kV, 50 Hz radial feeder supplies a small industrial load at the end of an 8 km overhead line. The line series impedance is (0.20 + j0.30) Ω per km.
717 words, about 4 min4Integral Windup in a Saturated Speed Loop
A DC-motor speed loop uses a PI controller followed by a four-quadrant converter. The speed reference is a step from 0 to 1000 rpm.
658 words, about 3 min5Op-Amp Gain That Looks Right at 1 kHz but Not at 10 kHz
A student builds a non-inverting amplifier with Rf = 99 kΩ and R1 = 1 kΩ, giving a designed closed-loop gain of 100. The op-amp has a gain-bandwidth product of 1 MHz, a slew rate of 0.5 V/µs, and output saturation at ±13 V.
665 words, about 3 min