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).
The current flowing through a circuit with a 60 V source and 6 k$\Omega$ of resistance is:
When converting 0.16 mA to microamperes, the result is:
Resistance of a wire is 2 ohms. The wire is stretched to double its length then its resistance in ohms is:
20 V source is connected across a 20 $\Omega$ resistor. How much energy is dissipated in three minutes?
In a three-phase system, when the loads are perfectly balanced, the neutral current is:
In a three-phase system, the voltages are separated by:
A 220 volt heater is used on 110 volt supply, heat produced by will be:
High pressure mercury vapour lamp is having _________ colour when they are started.
A multi-meter cannot be used to measure:
The potential difference across a 10 μF capacitor to charge it with 10 mC is:
A 4-pole three-phase induction motor has a synchronous speed of 25 rev/s. What will the frequency of the supply to the stator?
Capacitor motors are used in:
Pure water is electrically:
The earth conductor helps to ground:
In which of the following electrolysis is not used?
The unit of inductance is:
In a three-phase induction motor, which of the following statement is false?
A capacitor consists of two:
The slip speed of an induction motor may be defined as the:
The resistance of a conductor doesn't depend on:
The device which converts D.C. to A.C. is called:
The main characteristics of a DC shunt motor is:
A breather is used in transformer:
Bridge rectifier consists of:
Synchronous motor are used to: