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Exam Review

Key Facts: CHSE Odisha Elective Electronics Exam

200 marks

Elective Electronics total: Y1 and Y2 each Theory 70 + Practical 30

CHSE Odisha science_2016 Courses of Studies — Electronics

70 + 30

Theory and practical mark split each year

CHSE Odisha Electronics theory/practical structure

3 hours

Typical duration for each theory and practical paper

CHSE Odisha science_2016 Electronics general instructions

4th elective

Electronics is Group-B 4th elective only (Science scheme)

CHSE Odisha science_2016 scheme of studies

In AHSE fee

No separate elective marketplace fee; included in session exam fee

CHSE Odisha AHSE fee structure via colleges

CHSE Odisha Elective Electronics is a +2 Science Group-B elective (200 marks: each year Theory 70 + Practical 30, ~3-hour papers). Official assessment mixes constructed-response theory with lab practical—not a pure MCQ board paper. This free 2026 bank is an English MCQ study adaptation covering topics from science_2016 units from passive components through semiconductors, amplifiers, digital electronics, and communication systems.

Sample CHSE Odisha Elective Electronics Practice Questions

Try these sample questions to review concepts for the CHSE Odisha Elective Electronics exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In CHSE +2 Electronics, pure silicon at room temperature is classified as an:
A.Intrinsic semiconductor with thermally generated electron–hole pairs
B.Perfect metal with zero band gap
C.Insulator with no free carriers ever
D.Superconductor below critical temperature only
Explanation: Intrinsic semiconductors have a filled valence band and empty conduction band separated by a modest gap; thermal energy generates equal electrons and holes.
2Pentavalent impurities such as phosphorus, when added to pure silicon, produce:
A.A perfect metal with resistivity lower than copper
B.n-type extrinsic semiconductor with electrons as majority carriers
C.p-type semiconductor with holes as majority carriers
D.An insulator by filling the valence band completely
Explanation: Donor (Group-V) atoms contribute extra electrons, creating n-type material with electron majority carriers.
3Trivalent boron doping of germanium creates:
A.Intrinsic material with n = p exactly always
B.A metal-like free-electron gas only
C.p-type semiconductor with holes as majority carriers
D.n-type semiconductor with electrons as majority carriers
Explanation: Acceptors create hole majority carriers; the material is p-type extrinsic semiconductor.
4The forbidden energy gap of a typical insulator compared with a semiconductor is:
A.Exactly zero as in metals
B.Always smaller than in semiconductors
C.Negative, allowing free band overlap
D.Much larger, so very few carriers are thermally excited at room temperature
Explanation: Insulators have large Eg (several eV); semiconductors have smaller Eg (~1 eV class for Si/Ge).
5In a reverse-biased PN junction, the width of the depletion layer:
A.Increases and minority-carrier reverse current remains very small until breakdown
B.Disappears completely so current becomes huge ohmic
C.Becomes zero and the diode shorts like a wire
D.Reverses polarity of majority carriers only
Explanation: Reverse bias widens the depletion region and supports only a small reverse saturation current until breakdown.
6The potential barrier of a silicon PN junction is typically of order:
A.About 100 V for every commercial diode
B.About 0.7 V (silicon) and lower (~0.3 V) for germanium
C.Exactly 12 V like a car battery
D.Zero for all semiconductors at room temperature
Explanation: Built-in barrier is ~0.7 V for Si and ~0.3 V for Ge at room temperature (order-of-magnitude values taught at +2).
7A Zener diode is primarily designed to operate in:
A.The active region of a BJT
B.Open-circuit microwave resonance only
C.Controlled reverse breakdown as a voltage reference/regulator
D.Forward bias only as a high-current rectifier
Explanation: Zener (and avalanche) reverse breakdown is used for nearly constant reverse voltage regulation.
8An LED emits light when:
A.Strongly reverse biased into Zener breakdown only
B.Used as a pure ohmic resistor with no junction
C.Held exactly at zero bias with no current
D.Forward biased so injected carriers recombine and release photons
Explanation: Forward injection and radiative recombination produce visible/IR photons in LEDs.
9A photodiode is normally operated:
A.In reverse bias so photocurrent rises with incident light
B.Only as a series heater resistor
C.In hard saturation like a mechanical switch forever
D.Without any electrical connection
Explanation: Reverse-biased photodiodes convert incident light into reverse current proportional to intensity (idealized +2 model).
10In a half-wave rectifier with sinusoidal input Vm, the peak reverse voltage across the diode (ideal) is approximately:
A.0
B.Vm
C.2Vm
D.Vm/2
Explanation: In basic half-wave analysis the diode sees peak inverse voltage about Vm (ideal transformer secondary peak).

About the CHSE Odisha Elective Electronics Exam

Odisha CHSE Higher Secondary Elective Electronics follows the Science Courses of Studies (science_2016): a Group-B 4th elective with Theory 70 + Practical 30 each year. Year 1 builds from resistance, capacitance, inductance and resonance through vacuum tubes into semiconductors, rectifiers, BJT amplifiers and measuring instruments. Year 2 deepens amplifiers and oscillators, communication (AM/FM, antennas, propagation, TV), digital logic, power devices, radar and CRO. Prescribed practicals include multimeter/VTVM colour-code checks, diode and Zener characteristics, transistor CB/CE curves, rectifier efficiency/ripple, FET/SCR studies, LCR resonance, and Zener regulation. Electives total 200 marks; the Council Year-2 paper and practical count toward the pass certificate.

Exam sponsor: Council of Higher Secondary Education, Odisha (CHSE Odisha). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

CHSE Odisha Higher Secondary Elective Electronics carries 200 marks: Year 1 (Theory 70 + Practical 30 at college level) and Year 2 (Theory 70 + Practical 30 at Council AHSE). Duration of theory and practical papers is about 3 hours each. Practical grading commonly uses record (4), viva (6), and one experiment (20). Year-1 units cover passive components, AC/DC circuits, thermionic emission/vacuum tubes, semiconductors and PN devices, rectifiers/filters, transistors/biasing/basic amplifiers, instruments and ICs. Year-2 units cover voltage/power/feedback amplifiers and oscillators, AM/FM modulation and receivers, digital electronics and antennas, radio-wave propagation and TV, power electronics (JFET/SCR/DIAC/TRIAC/UJT), radar and CRO. This free bank is an English MCQ study adaptation—not a full theory/practical simulation.

Time Limit

3 hours (per 70-mark theory paper; practicals separate)

Passing Score

~30% minimum in theory (confirm current AHSE circular for theory/practical)

Exam / Certification Fees

Included in the CHSE Odisha AHSE examination fee for the session (collected through the affiliated college/H.S. school; no separate public per-elective marketplace fee).

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

~12% of this local bank

Passive Components & Circuits

R/C/L colour codes, Kirchhoff, resonance and Q.

~18% of this local bank

Semiconductors & Diodes

Energy bands, doping, PN bias, special diodes, rectifiers.

~18% of this local bank

Transistors & Amplifiers

BJT configs, biasing, RC-coupled, feedback, classes, oscillators.

~12% of this local bank

Digital Electronics

Binary, Boolean, De Morgan, six basic gates.

~14% of this local bank

Communication Basics

AM/FM, receivers, antennas, waves, TV, radar.

~12% of this local bank

Power Devices & Instruments

JFET/SCR/UJT family; multimeter, VTVM, CRO.

~14% of this local bank

Practical Skills

Colour code, device curves, ripple, soldering, safety.

Preparing for the CHSE Odisha Elective Electronics Exam

What You Need to Know

  • Passing score: ~30% minimum in theory (confirm current AHSE circular for theory/practical)
  • Assessment: CHSE Odisha Higher Secondary Elective Electronics carries 200 marks: Year 1 (Theory 70 + Practical 30 at college level) and Year 2 (Theory 70 + Practical 30 at Council AHSE). Duration of theory and practical papers is about 3 hours each. Practical grading commonly uses record (4), viva (6), and one experiment (20). Year-1 units cover passive components, AC/DC circuits, thermionic emission/vacuum tubes, semiconductors and PN devices, rectifiers/filters, transistors/biasing/basic amplifiers, instruments and ICs. Year-2 units cover voltage/power/feedback amplifiers and oscillators, AM/FM modulation and receivers, digital electronics and antennas, radio-wave propagation and TV, power electronics (JFET/SCR/DIAC/TRIAC/UJT), radar and CRO. This free bank is an English MCQ study adaptation—not a full theory/practical simulation.
  • Time limit: 3 hours (per 70-mark theory paper; practicals separate)
  • Exam / certification fees: Included in the CHSE Odisha AHSE examination fee for the session (collected through the affiliated college/H.S. school; no separate public per-elective marketplace fee). Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CHSE Odisha Elective Electronics: Suggested Study Strategy

1Master resistor colour code and series–parallel combinations before practical viva.
2Draw PN junction, rectifier, and CE amplifier diagrams until you can explain them without notes.
3Drill α–β relations, Class A/B efficiency ideas, and negative-feedback effects on gain/bandwidth.
4Practice binary conversions and truth tables for OR/AND/NOT/NAND/NOR/XOR daily.
5Link AM modulation index and superheterodyne stages to FM advantages and sky-wave MUF concepts.
6Use Bureau's Higher Secondary (+2) Electronics Part-I & II and current circulars from chseodisha.nic.in.

Frequently Asked Questions

How is CHSE Odisha Higher Secondary Elective Electronics examined?

Elective Electronics carries 200 marks across two years: each year Theory 70 marks plus Practical 30 marks. Year-1 is assessed at college level for promotion; Year-2 Council AHSE theory and practical count toward the pass certificate. Theory papers last about 3 hours and mix objective/short items with long unit questions (3 of 5). Practicals commonly score record (4), viva (6), and one experiment (20).

What are the main Electronics units in science_2016?

Year 1: passive R/C/L and circuits; thermionic emission and vacuum tubes; semiconductors and PN devices; rectifiers/filters; transistors, biasing and basic amplifiers; instruments and ICs. Year 2: voltage/power/feedback amplifiers and oscillators; AM/FM modulation and receivers; digital electronics and antennas; radio-wave propagation and TV; power electronics plus radar and CRO.

Is this practice bank the same format as the official CHSE paper?

No. Official papers mix very short, short, value-based, and long constructed-response items plus a separate practical exam. This bank is an English-language multiple-choice study adaptation for concept and calculation revision—not an official blueprint replica or lab substitute.

Does Elective Electronics include a practical exam?

Yes. Practical is 30 marks each year. Students must complete a minimum number of experiments (commonly at least 5 in Year 1 and at least 8 in Year 2) covering colour-code/multimeter work, diode/transistor characteristics, rectifiers, FET/SCR, LCR resonance, and Zener regulation as listed in science_2016.

What is the pass mark?

CHSE Odisha AHSE practice commonly requires about 30% as the minimum pass floor in theory; confirm theory/practical aggregation rules in the current AHSE notification on chseodisha.nic.in.

What does the exam cost?

Examination charges are included in the CHSE Odisha AHSE fee structure notified for the session and collected through the affiliated college/H.S. school—no separate public per-elective marketplace fee.