# Multiple Choice Questions (MCQ) on Basic Electrical Engineering

**11-The time taken by an alternating quantity to complete one cycle:**

(A) Time period

(B) Frequency

(C) Angular velocity

(D) Time constant

**12-Specific gravity of a fully charged lead acid cell is approximately:**

(A) 1.18

(B) 1.21

(C) 1.17

(D) 1.16

**13-Illumination of a surface is inversely proportional to:**

(A) Luminous intensity

(B) Distance from the source

(C) Square of the distance from the source

(D) Total Lumen

**14-Speed of dc motor is directly proportional to ___ and inversely proportional to:**

(A) flux, back emf

(B) current, back emf

(C) back emf, flux

(D) back emf, voltage

**15-Inductive reactance of a coil having inductance 4 H:**

(A) 796 x 10^{-6 }Ω

(B) 1256 Ω

(C) 314 Ω

(D) 628 Ω

**16-Generator efficiency is maximum when**

(A) Variable loss is minimum

(B) Constant loss = Variable loss

(C) Constant loss is minimum

(D) Constant loss is half of the variable loss

**17-Effective capacitance of capacitors connected in series, is**

(A) C = C_{1 }+ C_{2 }+ C_{3 }+ C_{4 }+……

(B) 1/C = 1/C_{1 }+1/C_{2 }+ 1/C_{3 }+ 1/C_{4 }+……

(C) C = 1/C_{1 }+ 1/C_{2 }+ 1/C_{3 }+ 1/C_{4 }+……

(D) C = 1/C_{1 }– 1/C_{2 }+ 1/C_{3 }– 1/C_{4 }+……

**18-Which is active component?**

(A) Capacitor

(B) Transistor

(C) Inductor

(D) Resistor

**19-Form factor =**

(A) rms value / average value

(B) average value / rms value

(C) rms value / peak value

(D) peak value / rms value

**20-Admittance is the ___ of conductance and suspectance.**

(A) Arithmetic mean

(B) Arithmetic difference

(C) Vector sum

(D) Reciprocal

**ANSWERS:**

**11-(A), 12-(B), 13-(C), 14-(C), 15-(B), 16-(B), 17-(B), 18-(B), 19-(A), 20-(C)**