Master official ISRO Space Applications Centre (SAC) Technician 'B' (Electrician) recruitment examination questions across Basic Electrical Principles & Circuit Laws, Magnetism & Inductance, AC Fundamentals & Polyphase Circuits, Transformers & Cleanroom Substation Operations, DC Machines & Special Motors (Stepper, Servo, BLDC), Online UPS, Battery Banks & Inverters, Solar Photovoltaic Systems, Cable Harnessing & High-Bay Electrical Wiring, Low-Resistance Clean Instrumentation Earthing, Measuring Instruments, and Aerospace Electrical Safety Standards.
Marking pattern: +1.00 / +3.00 positive, -0.33 / -1.00 (1/3rd) negative marking (Official ISRO Written Test / CBT Scheme).
At resonance, the RLC series circuit behaves as a:
LED stands for:
The symbol represents:
Four stripes of resistor are yellow, violet, red and gold will have a value of:
Find the current 'I' in the given circuit:
The general expression for Resistance is:
Two resistance R1 and R2 give combined resistance of 4.5 ohms when in series and 1 ohms when in parallel. The resistance are:
The Value of specific gravity of acid when a lead acid battery is fully charged is:
Five resistance are connected as shown in figure below. The equivalent resistance between the points A and B will be:
$\text{SF}_6$ gas is:
Current is measured by means of:
The level of illumination in an area is measured using:
Capacitor bank in a substation is used to:
For a transformer the condition for maximum efficiency is:
The power factor of a purely resistive circuit is:
General voltage equation of a dc motor is:
A DC series motor is best for driving:
Full load current of 5 HP 3 Phase 440 Volt induction motor will be:
The rms value of sinusoidal 100V peak is:
Load factor is defined as the ratio of:
A BJT has:
An electric machine will have high efficiency when:
The stator core of the induction motor is made of:
A circuit breaker is:
The main advantage of auto transformer over a two winding transformer is: