RRB JE practice question
An electric water heater rated 800 watts is used for 5 hours every day for 30 days. The number of units (kilowatt-hours) of electricity consumed is
From a RRB JE Science practice set · Science
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Correct answer: (C) 120
Power = 800 W = 0.8 kW. Daily energy = 0.8 × 5 = 4 kWh. For 30 days = 4 × 30 = 120 units.
हिंदी में प्रश्न
800 వాట్ల సామర్థ్యం గల ఒక విద్యుత్ నీటి హీటర్ను 30 రోజుల పాటు ప్రతిరోజూ 5 గంటలు వాడారు. ఖర్చైన విద్యుత్ యూనిట్ల (కిలోవాట్-గంటలు) సంఖ్య
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सही उत्तर: (C) 120
0.8 kW × 5 గం. = 4 యూనిట్లు/రోజు; 4 × 30 = 120 యూనిట్లు.
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