Karnataka SSLC Mid Term Question Paper 2025 Elements of Electrical Engineering

Government of Karnataka
Karnataka Secondary Education Examination Board

Question Papers
Mid Term

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KARNATAKA SCHOOL EXAMINATION AND ASSESSMENT BOARD
6th Cross, Malleshwaram, Bengaluru – 560 003

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S.S.L.C. MID-TERM EXAMINATION
FOR THE YEAR – 2025-26
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Subject : ELEMENTS OF ELECTRICAL ENGINEERING-IV

ËÐÜ¿á ÓÜíPæàñÜ : 51 Subject Code : 51

©®ÝíPÜ : 19. 09. 2025 ] [ Date : 19. 09. 2025
ÓÜÊÜá¿á : ¸æÙÜWæY 10-30 Äí¨Ü ÊÜá«ÝÂÖÜ° 1-45 ÃÜÊÜÃæWæ ] [ Time : 10-30 A.M. to 1-45 P.M.
WÜÄÐÜu AíPÜWÜÙÜá : 80 ] [ Max. Marks : 80

General Instructions to the Candidate :

1. This Question Paper consists of 17 questions.
2. Follow the instructions given against the questions.
3. Figures in the right hand margin indicate maximum marks for the questions.
4. The maximum time to answer the paper is given at the top of the question paper.
It includes 15 minutes for reading the question paper.
Note : Answer all the questions.
I. Four alternatives are given for each of the following questions / incomplete
statements. Select the most appropriate alternative and write it in the
answer book along with its alphabet : 10 × 1 = 10
1. The S.I. unit of time period is
(A) volt (B) ampere
(C) second (D) hertz
2. For a sine wave average value is
(A) 0·707 (B) 0·637
(C) 1·11 (D) 1·41

MID/T-25-26/60 [ Turn over

51 2
3. The set of positive and negative values of alternating quantity is called
(A) Amplitude (B) Cycle
(C) Frequency (D) Time period
4. Frequency is measured in
(A) hertz (B) ampere
(C) volt (D) second
5. The amplitude is also called as
(A) RMS value (B) Average value
(C) Maximum value (D) Form factor
6. The core of an A.C. motor is made of
(A) Brass (B) Silicon steel
(C) Aluminium (D) Copper
7. The phenomenon of electromagnetic induction is discovered by
(A) Faraday (B) Ohm
(C) Coulomb (D) Lenz
8. An A.C. generator converts
(A) Mechanical energy into D.C. electrical energy
(B) Mechanical energy into wind energy
(C) Mechanical energy into A.C. electrical energy
(D) Electrical energy into mechanical energy
9. Alternator is also called
(A) A.C. generator (B) D.C. generator
(C) A.C. motor (D) D.C. motor
10. Slip-rings are used in
(A) A.C. generator
(B) D.C. generator
(C) Wound rotor induction motor
(D) D.C. motor
II. Answer the following questions :
11. a) Define A.C. 2
b) Explain the following terms : 3
i) Frequency
ii) Time period
MID/T-25-26/60

3 51
c) Draw a neat diagram of sine wave and mark the following : 5
i) Positive half cycle
ii) Amplitude
12. a) What is power factor ? 2
b) List the advantages of three phase system over single phase system. 3
c) Draw the neat diagrams of star and delta connections. 5
13. a) List the types of power factor. 2
b) Explain the following terms : 3
i) Form factor
ii) RMS value
c) Write short notes on the following : 5
i) Peak factor
ii) Average value
14. a) Define A.C. motor. 2
b) List the types of induced emf. 3
c) Explain with neat diagram the phenomenon of electromagnetic induction. 5
15. a) Explain A.C. generator. 2
b) Explain self induced emf. 3
c) Draw the neat diagram of A.C. generator and label the parts. 5
16. a) List any four parts of A.C. generator. 2
b) Explain Faraday’s laws of electromagnetic induction. 3
c) Draw the neat diagram of wound rotor induction motor and label the parts. 5
17. a) Define electromagnetic induction. 2
b) Explain mutually induced emf. 3
c) Explain the working principle of A.C. generator. 5

MID/T-25-26/60 [ Turn over

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