ISRO Scientist Electrical

It is a computer-based test of multiple-choice questions, each with one correct answer. ISRO ICRB practice applies negative marking for wrong answers, so blind guessing costs marks. The official notification states the current paper structure, section composition and marking rules; confirm them there before your attempt.

Moderately to strongly competitive. Most items are standard undergraduate electrical engineering, but they are asked with numerical rigour and tight time pressure. Candidates who only revise formulae struggle; those who can set up and solve circuit, machine and power-system problems quickly tend to clear the cut-off comfortably.

There is no per-attempt limit in the usual sense. You may apply again in a later recruitment cycle if you still meet the age and qualification criteria in that cycle's notification. Eligibility rules, age relaxations and any attempt conditions are set by ISRO ICRB and can change, so read the current notification.

Do two passes. First sweep the conceptual and short numerical questions you can settle in under a minute, marking anything long. Then return to multi-step calculations with the remaining time. Because wrong answers are penalised, leave an item blank unless you can eliminate at least two options with confidence.

Start with circuits and networks, since machines, power systems, control and power electronics all assume it. Then take electrical machines and power systems, the two heaviest technical blocks. Add control systems and power electronics, then analog and digital electronics, and finally signals, measurements, mathematics and aptitude as maintenance topics.

Three recur. First, arithmetic slips in phasor, per-unit and equivalent-circuit work under time pressure. Second, shallow machine and protection knowledge that collapses on application questions. Third, neglecting aptitude and mathematics entirely, then losing easy marks. A timed mock every fortnight exposes all three before the real paper does.

Not as a primary strategy. Know typical values and the reasoning behind them, such as why transmission voltages are high or how relay settings are coordinated. Rote recall of standard numbers helps only marginally; the paper tests whether you can apply principles to an unfamiliar arrangement.

Only on ISRO's official recruitment pages and the ICRB notification for the current cycle. Those documents carry the authoritative question count, duration, fee, pay level, eligibility cut-offs and marking scheme. This page does not restate them because they change between cycles.