80% दक्ष, 2kW (इनपुट) मोटर अधिकतम भार पर 5 घण्टे से चल रही है तो उसके द्वारा उपयोग की गई ऊर्जा कितनी होगी?

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 1
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  1. 4 kWh
  2. 16 kWh
  3. 2 kWh
  4. 8 kWh

Answer (Detailed Solution Below)

Option 4 : 8 kWh
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Detailed Solution

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संकल्पना:

दक्षता(η) = (आउटपुट शक्ति)/(इनपुट शक्ति)

ऊर्जा = (शक्ति) (समय)

गणना:

आउटपुट शक्ति = (इनपुट शक्ति) (दक्षता) = 2 x 0.8

आउटपुट शक्ति  = 1.6 kW

आउटपुट ऊर्जा = 1.6 x 5 = 8 kWh

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