5 c]For the single phase transformer obtain an expression for EMF induced in either primary side or secondary side. Solution : N1 – be the no. of turns of the…
5 b] A shunt generator delivers 50 KW at 250 V and 400 rpm. The armature and shunt field resistances are 0.02 Ω and 50 Ω respectively. Calculate the speed…
5 a] With a neat diagram explain the constructional details of DC generator. Construction of DC Machine. Salient parts of a D.C.Machine are:(i)Yokeii) Field system (poles)(iii) Armature(iv) Commutator(v)Brushes Yoke:It is…
2.C] Two resistors are connected in parallel and a voltage of 200V is applied to the terminals. The total current taken is 2.5 A, and the power dissipated in one…
2.A] A load resistance 𝑅𝐿Ω is connected across the source 𝑉𝑆 with internal resistance 𝑅𝑖𝑛𝑡 in series with source; obtain the condition that the power transferred to load from source…
1.C] A resistance R is connected in series with a parallel circuit comprising two resistances of 12 Ω and 8Ω respectively. The total power dissipated in the circuit is 70…
1.B] A sinusoidally varying alternating voltage is given by, 𝑣(𝑡) = 𝑉𝑚𝑠𝑖𝑛𝜔𝑡, to obtain its RMS value of voltage in terms of maximum value. Answer:- RMS Value of an Alternating…
7.A] How rotating magnetic field is set up in the case of three phases induction motor? Illustrate with neat figures. Answer:-
7.B] What is a slip of an induction motor and derive an expression for the frequency of rotor current in terms of supply frequency? Answer: Slip of Induction Motor: Slip…
4.C] A balanced 3-phase star-connected system draws power from a 440V supply. The two wattmeters connected indicate 5KW and 1.2 KW. Determine power, power factor, and current in the circuit…
