Goa Board Class 10 Question Paper 2024 Electronics

2025

GOA BOARD
QUESTION
PAPERS
2024
Question Papers

Prepare yourself for upcoming Goa
Board Exams

2024 IV 23 0930 Seat No.

Time : 2 Hours ELECTRONICS
Pre-Vocational

Subject Code

S 1 0 4 3

Total No. of Questions : 4 (Printed Pages : 4) Maximum Marks : 40

INSTRUCTIONS : (i) All the questions are compulsory.

(ii) Figures to the right indicate full marks.

(iii) Draw a neat labelled diagram wherever necessary.

(iv) Answer each question on a fresh page.

1. (A) Answer the following in one word : 2

(i) Which component of a moving coil loudspeaker vibrates to
produce sound ?

(ii) Name the commonly used material to manufacture stationery
plates of capacitor loudspeaker.

(B) Answer the following in brief : 6

(i) What is a microphone ? Explain the construction of microphone
which uses carbon granules for its operation.

(ii) Explain the working of dynamic speaker.

(C) Answer the following in short : 2

(i) “It is folded and placed in the powerful magnetic field” Based
on the given statement identify and name the given microphone
and state one advantage of it.

S-1043 1 P.T.O.

2. (A) Answer the following in one sentence : 2

(i) What is the cause of whistling sound in a Public address
system ?

(ii) Define ripples factor with respect to a power supply circuit.

(B) Answer the following in brief : 6

(i) What is Rectification ? Draw a neat and labelled diagram of
centre-tap rectifier along with its corresponding input and output
waveform.

(ii) Draw a block diagram of power supply circuit and explain its
last 3 blocks.

(C) Answer the following in short : 2

(i) Name the transducers used in a Public Address system. Show
the layout connection diagram for installing a PA system in a
conference hall.

3. (A) Answer the following in one or two words or sentences : 2

(i) Name the region in the bipolar junction transistor which is
heavily doped.

(ii) How do copper losses occur in a transformer ?

(B) Answer the following in short : 4

(i) State two points of difference between Shell type and Core type
transformer.

(ii) Explain the construction of a transformer along with a neat
labelled diagram.

S-1043 2

(C) Answer any one of the following in detail : 4

(i) State two characteristics of common emitter configuration. Draw

a crystal structure of N-Type semiconductor materials and

explain how it is obtained.

(ii) State two characteristics of common base configuration in

transistor. Explain with diagram what happens to the charge

carriers when a P-N junction is formed in a diode.

4. (A) Answer the following in one sentence : 2

(i) Define Amplitude of a sound wave.

(ii) State Ohm’s Law.

(B) Answer the following in brief : 4

(i) Rahul runs his juicer every morning. The juicer uses 90 W of

power and the current drawn is 0.45 A. How much volts is

necessary to run the juicer ?

(ii) Shane was given a NPN transistor and was ask to find whether

the transistor is good or bad. Name the instrument she will

use to do the testing and explain how the testing has to be

done.

S-1043 3 P.T.O.

(C) Answer any one of the following in detail : 4

(i) A wave train moving along a rope has a velocity of 100 m/s and

wavelength of 20 M. What is its time period ?

What are ultrasound and infrasound frequencies ? State any one

characteristic of sound wave.

(ii) If the Frequency of the tuning fork is 400 Hz and the velocity

of sound in air is 320 m/s, find how far the sound travels if the

tuning fork makes 30 vibrations. What is compression and

rarefaction of sound wave ?

S-1043 4

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