## Kerala PSC Previous Years Question Paper & Answer

Title : Industries Extension Officer Industries And Commerce English
Question Code : A

Page:6

Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Industries Extension Officer Industries And Commerce English ' And exam conducted in the year 2019. And Question paper code was '067/2019'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.

page: 6 out of 14
Excerpt of Question Code: 067/2019

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50.

Aluminium can be classified as a :
(A} Soft magnetic material {B) Diamagnetic material
{C) Paramagnetic material (D) Ferromagnetic material

Two long single layer solenoids have the same length and same number of turns but are
placed co-axially one within other. The diameter of inner coil is 4 cm and that of outer coil is
8 cm. The coefficient of coupling between the coils is :

(4) 5 (8) 0.2

(0) 0.6 യ 0.18

The current changing at 0.1 A/sec induces an e.m.f. of 5 V. The self inductance of the coil is :
(A} 0.06 mH ற கணி
(0) 0.5mH (D} 20mH

The total inductance across AB for the Fig. 2 is :

AmH

10+ 1508
Fig. 2
&) 1mH ட 1.5mH

The alternating voltage v=280sin(814i+/8) is applied across AC circuit draws a current of
i=10sin(814¢ — 7/6) . The power absorbed by the circuit is :

(ಹ 1150w B) 0%

(0 2300w D) 23w

Two voltage sources 100/25 V and 100/25 V are connected in parallel across 50Q
resistance. The currents through the resistance is :

Ay 4A (8) 24

€y 1A യ 04

Three 100 Q resistances are connected in delta across 400 V, 50 Hz, 3-phase line. If one of the
resistor is disconnected, the power taken by the load 18 :

வ 3.2 7 B) 4.8kW