Practice question

MCQ

Question

What is the energy equivalent of 2 kg of matter in Joules? (Given c = 3 × 10⁸m/s )

Options

Choose one · Correct answer highlighted

1.6 × 10¹⁷ J 1.7 × 10¹⁷ J 1.8 × 10¹⁷ J Correct 1.9 × 10¹⁷ J

Explanation

Given: What is the energy equivalent of 2 kg of matter in Joules? (Given c = 3 × 10⁸m/s ) Formula: E = m c². Substitution & Calculation: m = 2 kg, c² = 9 × 10¹⁶m²/s² . E = 2 × 9 × 10¹⁶= 1.8 × 10¹⁷J . Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.

Share this question

Discussion

Comments

0 comments

Please log in to join the discussion.

No comments yet. Be the first to start the discussion.

Related blogs

Guides and insights connected to this topic

Class IX Science 14 Sep 2026

Earth as a System: Energy Matter and Life Notes - Geosphere, Hydrosphere, Atmosphere, Biosphere and Greenhouse Effect

Explore how the Sun, Earth's interior heat and chemical reactions drive energy and matter through the geosphere, hydrosphere, atmosphere and biosphere.

Class X Science 13 Sep 2026

Sources of Energy Notes - Conventional vs Non-Conventional, Solar, Nuclear and Environmental Impact

Explore class 10 notes on energy sources, comparing conventional and non‑conventional types, including solar and nuclear power and their environmental impact.

Class X Science 13 Sep 2026

Electricity Notes - Electric Current, Potential, Ohm's Law, Resistance, Heating Effect and Power

Learn the basics of electric current, circuits, potential, Ohm's law, resistance, heating effect and power in clear, concise notes.