Objective Questions Short notes Objective questions (Answers are given below) An a.c. current given by i = 14.14 sin (ωt +π/6) has an r.m.s value of — amperes.(a) 10(b) 14.14(c) 1.96(d) 7.07and a phase of — degrees.(e) 180(f) 30(g) − 30(h) 210 If e1 = A sin ωt and e2 = B sin (ωt − … Read more
Objective Questions Short notes Objective questions (Answers are given below) The kWh meter can be classified as a/aninstrument:(a) deflecting (b) digital(c) recording (d) indicating The moving system of an indicating type ofelectrical instrument is subjected to :(a) a deflecting torque(b) a controlling torque(c) a damping torque(d) all of the above The damping force acts on … Read more
Objective Questions Short notes Objective questions (Answers are given below) Active materials of a lead-acid cell are :(a) lead peroxide (b) sponge lead(c) dilute sulphuric acid (d) all the above During the charging of a lead-acid cell :(a) its cathode becomes dark chocolate brownin colour(b) its voltage increases(c) it gives out energy(d) specific gravity of … Read more
Objective Questions Short notes Objective questions (Answers are given below) Permanent magnets are normally made of(a) aluminium (b) wrought iron(c) cast iron (d) alnico alloys A coil of 1000 turns is wound on a core.A current of 1 A flowing through the coilcreates a core flux of 1 mWb. The energystored in the magnetic field … Read more
Objective Questions Short notes Objective questions (Answers are given below) According to Faraday’s Laws of Electromagnetic Induction, an e.m.f. is induced in a conductor whenever it (a) lies in a magnetic field(b) cuts magnetic flux(c) moves parallel to the direction of themagnetic field(d) lies perpendicular to the magnetic flux. A pole of driving point admittance … Read more