In electrodynamometer ammeter, the deflection of the pointer scale is proportional to
in which welding, the parts lie in the same plane and are joined at their edges
Faraday’s Law of Induction is represented as _______.
When the soil favors the corrosion then which electrode should be preferred?
Which one of the following is not necessary for the parallel operation of Alternator ?
According to the Thumb rule in overhead lines, which of the following statement is true?
During the Thermal ionization of gas in circuit breaker, the molecules collides each other at a rate of
Which of the following mode of operation of NPN transistor occurs when emitter is negative with respect the base?
What is the SCR of synchronous machine when XS (saturated) is 1.4 pu
Universal motors has wide and easily controllable speed range, typically of
Which of the following is true regarding power factor?
Which motor is used in electric traction system?
If the input voltage, v(t) = 4 + 3sin(4t) + 2sin(5t) + 15sin(10t) & the current supplied by the source is i(t)= 7 + 2sin(4t) + 4sin(5t) + 10sin(15t). Calculate the average power delivered by the source?
Which among these is a configuration of an isolator?
I. Vertical break type
II. Horizontal type
III. Horizontal break with two post insulator
IV. Horizontal break centre post rotating double break
V. Pantograph type
By what phase angle are the phases of a three-phase supply separated?
In DC machines which one of the following neutralizes the armature cross flux under brush axis to improve commutation process in DC machines.
If the field of the synchronous motor is under excited, the power factor will be
In a circuit, Inductance L = 8 mH & Resistance R = 4 Ω, having a time constant T1 , If in place of one inductor four inductor of same value are connected in parallel & their combination in series with resistor of 4 ohm, then the new time constant of circuit is T2. Find the ratio of two-time constant T1/T2?
For a certain dynamometer ammeter, the mutual inductance ‘M’ varies with the deflection θ as M = -6cos(θ + 30⁰) mH. Find the deflecting torque (in µNm) produced by a direct current of 50 mA corresponding to a deflection of 60⁰.