10th cbse sample paper 2023-24 – Discussion Forum

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Mayur Arya

Asked: December 27, 2023In: Class 10 Science

Kaveri conducted an experiment to study the energy efficiency of different bulbs. She connected a bulb A having a resistance of 100 ohms to a 240 V power supply in a laboratory. (a) How much energy will be consumed by the bulb, if it is kept ON for 4 hours each day for a week? Express your answer in kJ. (b) Kaveri connects another similar bulb B in series with bulb A and connects the combination to a 240 V supply. Will there be any change in the brightness with which bulb A glows now? Explain mathematically.

Energy efficiency refers to using less energy to perform a task while maintaining or improving performance. It involves optimizing technology and practices to reduce energy consumption, costs, and environmental impact.