2 A কারেন্ট বহনকারী 5-ওহম রোধের অপচিত শক্তিকে কী বলে?

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RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 3)
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  1. 10 W
  2. 0.6 W
  3. 2.5 W
  4. 20 W

Answer (Detailed Solution Below)

Option 4 : 20 W
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ধারণা :

  • শক্তি: কোন বৈদ্যুতিক প্রবাহ দ্বারা কাজ করার হারকে শক্তি বলে। এটি P দ্বারা চিহ্নিত করা হয়। পাওয়ারের SI একক হল ওয়াট (W)

প্রদত্ত শক্তি অপচয়:

শক্তি (P) = VI = V2 /R = I2 R

যেখানে V হল সম্ভাব্য বিভব পার্থক্য, I হল প্রবাহিত কারেন্ট এবং R হল রোধ।

গণনা :

প্রদত্ত:

রোধ (R) = 5 Ω

কারেন্ট (I) = 2 A

শক্তি (P) = I2 R = 22 x 5 = 20 W

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