Work can be performed only when energy is supplied to a system. In an electrical circuit, electrical energy can be converted into other forms such as heat, light, or mechanical energy.
In order that work may be done
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Question context
This question is part of ⚡ Electrical Engineering within the broader 🛠️ Engineering Essentials subject and appears in the PTS Pakistan Testing Service preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.