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Electronic Voting Machines (EVMs) and Electoral Integrity

PYQs

6

Articles

1

Momentum

17

Phase IFoundation

Background

Overview

EVMs are fundamental to India's democratic process. UPSC examines their technical aspects, security features, role in ensuring free and fair elections, and the controversies surrounding their reliability and transparency, which are critical for electoral reforms and public trust.

Electronic Voting Machines (EVMs) are the primary means of recording votes in Indian elections, designed to enhance efficiency, transparency, and prevent electoral malpractices. They comprise a Control Unit (CU) and Ballot Unit (BU), with security protocols like tamper-evident seals and unique identification tags to ensure their integrity.

Phase IIStatic core

Facts & tables

Key facts

Components

Consist of a Control Unit (CU) and one or more Ballot Units (BUs).

Security Features

Include unique serial numbers, address tags, and tamper-evident seals (e.g., amber seals).

Manufacturing

Manufactured by public sector undertakings like Bharat Electronics Limited (BEL) and Electronics Corporation of India Limited (ECIL).

Oversight

The Election Commission of India (ECI) is responsible for their deployment, management, and security protocols.

Reference table

Static syllabus anchors

TypeReference
Conceptual areaConstitutional & Statutory Bodies

Reference table

Institutions & roles

BodyRole
Election Commission of IndiaRegulates/oversees
Bharat Heavy Electricals Limited (BHEL)Supervises verification (as per article)
Phase IIIExam lens

Prelims angle

Overview

Prelims angle: Multi-statement analysis

Prelims angle: Institutional roles and functions

Quick revision

  • EVMs: Control Unit (CU) and Ballot Unit (BU).
  • Security: Address tags, amber seals, unique IDs.
  • ECI's role in deployment and security.
  • Allegations of tampering and demands for transparency.
  • VVPAT as an additional verification layer.

Elimination traps

Constitutional vs statutory — EVMs are a tool used by the Election Commission (a constitutional body), but the machines themselves are not constitutional.

Check if created by Constitution or by Parliament.

High-confidence PYQs

2025Multi-statement analysis, Factual recall

With reference to India, consider the following: I. The Inter-State Council II. The National Security Council III. Zonal Councils How many of the above wer...

Indian PolityOpen question
2023Multi-statement analysis, Factual recall

Consider the following statements in respect of election to the President of India: 1. The members nominated to either House of the Parliament or the Legisla...

Indian PolityOpen question
2019Multi-statement analysis, Factual recall

Consider the following statements : 1. Petroleum and Natural Gas Regulatory Board (PNGRB) is the first regulatory body set up by the Government of India. 2...

EconomyOpen question
2018Multi-statement analysis, Institutional roles and functions

How is the National Green Tribunal (NGT) different from the Central Pollution Control Board (CPCB)? 1. The NGT has been established by an Act whereas the CPC...

Environment & EcologyOpen question
2017Multi-statement analysis, Factual recall

Consider the following statements: 1. The Election Commission of India is a five-member body. 2. Union Ministry of Home Affairs decides the election schedul...

Indian PolityOpen question
2016Multi-statement analysis, Institutional roles and functions

Which of the following are the key features of ‘National Ganga River Basin Authority (NGRBA)’? 1. The river basin is the unit of planning and management. 2...

Environment & EcologyOpen question

Topic timeline

Constitutional & Statutory Bodies
Prelims 2016· Multi-statement analysis, Institutional roles and functions

Which of the following are the key features of ‘National Ganga River Basin Authority (NGRBA)’? 1. The river basin is the unit of planning and management. 2...

Open question
Prelims 2017· Multi-statement analysis, Factual recall

Consider the following statements: 1. The Election Commission of India is a five-member body. 2. Union Ministry of Home Affairs decides the election schedul...

Open question
Prelims 2018· Multi-statement analysis, Institutional roles and functions

How is the National Green Tribunal (NGT) different from the Central Pollution Control Board (CPCB)? 1. The NGT has been established by an Act whereas the CPC...

Open question
Prelims 2019· Multi-statement analysis, Factual recall

Consider the following statements : 1. Petroleum and Natural Gas Regulatory Board (PNGRB) is the first regulatory body set up by the Government of India. 2...

Open question
Prelims 2023· Multi-statement analysis, Factual recall

Consider the following statements in respect of election to the President of India: 1. The members nominated to either House of the Parliament or the Legisla...

Open question
Prelims 2025· Multi-statement analysis, Factual recall

With reference to India, consider the following: I. The Inter-State Council II. The National Security Council III. Zonal Councils How many of the above wer...

Open question

DMK to boycott verification of EVMs in Kolathur alleging lapses; plans to go to court

02 Aug 2026 · EVMs are electronic devices for voting, crucial for election integrity. Key components are CU and BU, secured by seals and tags. Debates often focus on their tamper-proof nature and the role of the ECI.

Read article

Related topics

Current topic

Electronic Voting Machines (EVMs) and Electoral Integrity

Often confused with

Electoral Disputes and Judicial Intervention

Open notes

Practice writing on this topic

UPSC has asked 6 linked questions on Electronic Voting Machines (EVMs) and Electoral Integrity in Mains. Write an answer to one — and get it evaluated.

See Mains PYQsEvaluate an answer

UPSC Prelims PYQs on Electronic Voting Machines (EVMs) and Electoral Integrity

Practice official previous year questions asked by UPSC related to this concept.

How is the National Green Tribunal (NGT) different from the Central Pollution Control Board (CPCB)? 1. The NGT has been established by an Act whereas the CPC...

2018·Environment & Ecology
Solve

Which of the following are the key features of ‘National Ganga River Basin Authority (NGRBA)’? 1. The river basin is the unit of planning and management. 2...

2016·Environment & Ecology
Solve

With reference to India, consider the following: I. The Inter-State Council II. The National Security Council III. Zonal Councils How many of the above wer...

2025·Indian Polity
Solve

Consider the following statements : 1. Petroleum and Natural Gas Regulatory Board (PNGRB) is the first regulatory body set up by the Government of India. 2...

2019·Economy
Solve

Consider the following statements: 1. The Election Commission of India is a five-member body. 2. Union Ministry of Home Affairs decides the election schedul...

2017·Indian Polity
Solve

Consider the following statements in respect of election to the President of India: 1. The members nominated to either House of the Parliament or the Legisla...

2023·Indian Polity
Solve

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