Karnataka SSLC Question Paper 2025 Elements of Electrical Engineering

Government of Karnataka
Karnataka Secondary Education Examination Board

Question Papers

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TEAR HERE TO OPEN THE QUESTION PAPER
Subject : ELEMENTS OF ELECTRICAL ENGINEERING-IV

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General Instructions to the Candidate :
1. This question paper consists of 17 questions.
2. This question paper has been sealed by reverse jacket. You have to cut
on the right side to open the paper at the time of commencement of
the examination ( Follow the arrow mark ). Do not cut the left side to
open the paper. Check whether all the pages of the question paper are
intact.
3. Follow the instructions given against the questions.
4. Figures in the right hand margin indicate maximum marks for the
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5. 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.
6. Ensure that the Version of the question paper distributed to you and
Tear here

the Version printed on your admission ticket are the same.

CCE RF/RR(A)/101/1829 1 of 8

CCE RF/RR(A)/101/1829 51

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 frequency is

(A) hertz (B) ampere

(C) volt (D) watt

2. For a sine wave RMS value is

(A) 0·637 (B) 1·11

(C) 0·707 (D) 1·414

3. The core of an alternator is made of

(A) Brass (B) Silicon steel

(C) Aluminium (D) Copper

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CCE RF/RR(A)/101/1829 51

4. An A.C. generator converts

(A) Mechanical energy into DC electrical energy

(B) Mechanical energy into chemical energy

(C) Electrical energy into mechanical energy

(D) Mechanical energy into A.C. electrical energy

5. In step-up transformer

(A) N1 < N 2 (B) I1 = I 2

(C) N1 > N 2 (D) N1 = N 2

6. Electrical bell is an example for

(A) heating effect (B) lighting effect

(C) chemical effect (D) magnetic effect

7. Which of the following is a non-renewable source of energy ?

(A) Hydroelectric energy (B) Solar energy

(C) Nuclear energy (D) Wind energy

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CCE RF/RR(A)/101/1829 51

8. Which of the following power plants uses coal ?

(A) Solar power plant

(B) Nuclear power plant

(C) Thermal power plant

(D) Hydroelectric power plant

9. An impurity which accepts the electron is called

(A) Acceptor impurity

(B) Pentavalent impurity

(C) Donor impurity

(D) Trivalent impurity

10. A pure semiconductor is called

(A) Extrinsic semiconductor

(B) P-type semiconductor

(C) Intrinsic semiconductor

(D) N-type semiconductor

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II. Answer the following :

11. a) Define A.C. 2

b) Explain the following terms : 3

i) RMS value

ii) Frequency

c) Draw the neat diagram of sine wave and mark the following :

5

i) Positive half-cycle

ii) Amplitude

12. a) Define A.C. Generator. 2

b) List the types of induced emf. 3

c) Explain the phenomenon of electromagnetic induction. 5

13. a) List the applications of diode. 2

b) Explain Faraday’s law of electromagnetic induction. 3

c) Draw a neat diagram of squirrel cage rotor induction motor

and label the parts. 5

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14. a) Define semiconductor. 2

b) Write any three applications of transformer. 3

c) Draw a neat diagram of transformer and label the parts. 5

15. a) List the sources of energy. 2

b) Write short notes on solar power plant. 3

c) Draw the neat diagram of hydroelectric power plant and

label the parts. 5

16. a) Draw the symbolic representation of N-P-N transistor. 2

b) Write the comparison between renewable and non-

renewable sources of energy. 3

c) Draw a neat diagram of electrical fan and label the parts.

5

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17. a) Define doping. 2

b) Explain the following terms : 3

i) Average value

ii) Power factor

c) Explain with neat sketch forward biasing of diode. 5

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