Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-07: Physics›Electricity and its effects: Electric intensity, potential, potential difference, electric current, Ohm's law, resistance, specific resistance, factors influencing resistance, combination of resistance (numerical examples), thermal effect of current and its use, calculation of power and electrical energy spent (numerical), precautions in electric experiments›The amount of heat produced in 5 minutes by an electric heater rated

The amount of heat produced in 5 minutes by an electric heater rated at 1000 W is

20192M#mppsc-forest#pyq#mcq#2019
A.2 × 10510^5105 J
B.3 × 10510^5105 JCorrect
C.4 × 10510^5105 J
D.300 J
Explanation & Solution

Correct Answer: (B) 3 × 10^5 J

Heat produced (H) = Power (P) × Time (t). Given P = 1000 W and t = 5 minutes = 300 seconds. Therefore, H = 1000 W × 300 s = 3 × 10^5 Joules.

हिंदी में प्रश्न एवं आदर्श उत्तर

एक विद्युतीय उष्मक जो 1000 W शक्ति पर 5 मिनट तक कार्य करता हो, तो उत्पन्न उष्मा ऊर्जा __________ होगी ।

A.2 × 10510^5105 J
B.3 × 10510^5105 Jसही
C.4 × 10510^5105 J
D.300 J

सही उत्तर: (B) 3 × 10^5 J

उत्पन्न ऊष्मा H = P × t के अनुसार, शक्ति P = 1000 W और समय t = 5 मिनट = 300 सेकंड है। अतः H = 1000 × 300 = 3 × 10^5 जूल होगी।

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