जेव्हा ओहमच्या नियमाचे पालन करणार्या प्रतिरोधक वाहकाच्या प्रतिरोध R मधील विभवांतर दुप्पट केले जाते, तेव्हा उष्णता निर्मितीचा दर किती होईल?

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ALP CBT 2 Physics and Maths Previous Paper 6 (Held On: 22 Jan 2019 Shift 3)
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  1. दुप्पट
  2. एक चतुर्थांश
  3. अर्धा
  4. चारपट

Answer (Detailed Solution Below)

Option 4 : चारपट
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Detailed Solution

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संकल्पना:

  • विद्युत्‌विरोध: विद्युत साहित्य आणि विद्युत उपकरणे यांच्या गुणधर्माला विद्युत्‌विरोध म्हणतात.
    • हे R द्वारे दर्शविले जाते. विद्युत्‌विरोधाचे SI एकक ओहम (Ω) आहे.
  • शक्ती: विद्युत प्रवाहाने केलेल्या कामाच्या दराला शक्ती म्हणतात. हे P द्वारे दर्शविले जाते. शक्तीचे SI एकक वॅट (W) आहे.

शक्ती अपाकरण याद्वारे दिले जाते:

शक्ती (P) = V I = V2/R = I2 R

उष्णता निर्मिती (H) = (V2/R) t

जिथे V हा विद्युत्‌विरोधातील संभाव्य फरक आहे, I विद्युत प्रवाह आहे आणि R हा विद्युत्‌विरो आहे.

गणना:

उष्णता निर्मिती (H) = (V2/R) t

संभाव्य दुप्पट आहे, V' = 2 V

त्यामुळे नवीन उष्णता निर्मिती (H') = (V'2/R) t = ((2V)2/R) t = 4 (V2/R) t = 4 H

त्यामुळे पर्याय 4 योग्य आहे.

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