MBOSE Class 12 Question Paper 2026 for Electronics and Hardware

FOR MBOSE CLASS 12 EXAM PREPARATION

MBOSE Class 12 2026
Question Paper ·
Electronics Hardware
EXAM YEAR TYPE SUBJECT

MBOSE Class 12 2026 Question Paper Electronics Hardware

Notes · Sample Papers · Previous Year Papers · Mock Tests

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Total No. of Printed Pages—4
HS/XII/A.Sc.Com/EH/26
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( Installation Technician Computing and Peripherals )

Full Marks : 30
Time : 1 hour

The figures in the margin indicate full marks for the questions

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1. Choose the correct answer : .co 1×8=8

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(a) How many symbolic representations does an LED
light have? a
(i) One

(ii) Two

(iii) Three

(iv) Four
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m protecting device used in an electric circuit to m
c. o(b) Aprotect .co
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against electric shock is
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(i) TPS

(ii) PROFIBUS

(iii) GFCI

(iv) GMI

/84 [ P.T.O.

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( 2 )

(c) Which one of the following materials is not used to
make casing of a fuse?
(i) Ceramic
(ii) Glass
(iii) Silver
(iv) Plastic

(d) The amount of voltage drop across the load is
measured by a/an
(i) multimeter
(ii) ammeter
(iii) voltmeter
(iv) energy meter

(e) What is the primary function of an AC drive?
(i) To convert AC power to DC power
(ii) To convert fixed-frequency AC power to
variable-frequency AC power
(iii) To convert mechanical energy into electrical
energy
(iv) To convert electrical energy into mechanical
energy

(f) Which component is considered the ‘brain’ of a PLC
system?
(i) Power supply
(ii) Input/output (I/O) module
(iii) Central Processing Unit (CPU)
(iv) Programming device

HS/XII/A.Sc.Com/EH/26/84 [ Contd.

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( 3 )

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Which of the following is used to connect the wire
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winding of a motor into star and delta form?
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(i) Thread
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(ii)glRubber
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(iii) Copper wire
(iv) Metal strip

(h) Which of the following is not a control key on the
VFD panel?
(i) Start reverse run
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(ii) Stop/Reset
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(iii) Start forward run
(iv) Forward-reverse runag

2. Answer the following in 1 word or 1 sentence each
(any four) : 1×4=4

(a) What is an electrical hazard?

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(b) On which principle does transformer work?
c. o(c) Define switchgear in electrical network. m.co
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a (d) Define motor.

(e) What is rectifier?

(f) Write a short note on rewireable fuse.

HS/XII/A.Sc.Com/EH/26/84 [ P.T.O.

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a For more Question Papers, Sample Papers, Notes & Syllabus visit Page 3 of 4

( 4 )

3. Answer the following in 3 or 4 sentences each (any three) :
2×3=6
(a) What are the basic input/output systems in PLC?
(b) State squirrel cage induction motor.
(c) What are the control schemes of the VFD?
(d) What is a potential transformer?
(e) What first aid measure should be taken in case of
electric shock?

4. Answer the following essay-type questions (any three) :
4×3=12
(a) What is testing? Explain the construction and
working principle of a current transformer.
(b) What is a motor? Describe various electrical power
distribution systems.
(c) What is a transformer? Explain different parts of a
transformer.
(d) State the different applications of electric drive.
Explain the construction, parts and function of an
AC generator.
(e) Write short notes on the following :
(i) Circuit breaker
(ii) Busway
(iii) Load centre
(iv) Surge arrester

HH H

HS/XII/A.Sc.Com/EH/26/84 26K—320

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