Master official Physical Research Laboratory (PRL), Ahmedabad Technician 'B' (Electrician) recruitment examination questions across Basic Electrical Principles & Circuit Laws, Magnetism & Inductance, AC Fundamentals & Polyphase Circuits, Substation Transformers, High-Precision Servo Drives & Stepper Motors for Astronomical Telescopes, Cryocooler Compressor Motor Drives, Laboratory Online UPS & VRLA Battery Banks, Dedicated Low-Noise Clean Instrumentation Earthing (<0.5Ω), Power Cabling & Cleanroom Electrical Distribution, Electrical Measuring Instruments, and Laboratory Safety Standards.
Marking pattern: +1.00 / +3.00 positive, -0.33 / -1.00 (1/3rd) negative marking (Official DOS / ISRO / PRL Written Test / CBT Scheme).
A 220 V DC motor has an armature resistance of 0.5 Ω and a back EMF of 200 V. What will be the current drawn by the motor?
Which device acts as a switch but cannot amplify signals?
What is the typical power consumption range of a BLDC ceiling fan?
What color does silica gel turn when it is fully saturated with moisture?
Which of the following is not a protective device?
A 10 micro-Farad capacitor is connected to a 200V, 50Hz supply. Find the current drawn.
If a 220 V heater is used on 110 V supply, heat produced will change by:
Low and medium voltage underground cables should be laid at a depth of:
Which condition is called as resonant RLC circuit?
When a 3-phase system is not grounded and a single line-to-ground fault occurs, the voltage of the other two healthy phases will:
How many numbers between 11 and 90 are divisible by 7?
If a and b both are odd numbers, then which of the following is an even number?
The L.C.M. of 16, 24, 36, and 54 is:
31.004 - 17.2386 = ?
If $3x + y = 19$, and $x - y = 9$, then $y = ?$
What fraction of an hour is a second?
If the cost price is 96% of selling price, then what is the profit percent?
How long will a boy take to run around a square field of side 35 meter, if he runs at the rate of 9 km/hr?
1/2 is what percent of 1/3 ?
The Indian Space Research Organization was founded in 1969 by:
Two particles carrying same electrostatic charge when brought nearer will:
The laws of gravitation were propounded by:
The flow of current in a conductor is due to movement of:
Diamond is an allotrope of:
Which of the following gases helps in combustion?