रामने 50 W आणि 220 V असे क्षमतानिर्देशित केलेला एक बल्ब विकत घेतला. जेव्हा तो 220 V विद्युत पुरवठ्याशी जोडलेला असतो, तेव्हा त्याचा प्रतिरोध किती असेल?

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RRB Group D 17 Sept 2022 Shift 3 Official Paper
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  1. 868 Ω
  2. 968 Ω
  3. 1098 Ω
  4. 1068 Ω

Answer (Detailed Solution Below)

Option 2 : 968 Ω
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Detailed Solution

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पर्याय 2) 968 Ω हे योग्य उत्तर आहे.

दिलेले आहे:

\(P=50W,V=220V\)

सूत्र:

\(P={V^2\over R}\)

गणना:

\(P={V^2\over R}\)

\(R={V^2\over P}\)

\(R={220^2\over 50}\)

\(R={48400\over 50}=968Ω\)

अशाप्रकारे, बल्बचा प्रतिरोध 968 Ω आहे. 

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