10 और 25 प्रत्येक लाभ वाले दो एम्पलीफायर कैस्केड किए गए हैं। यदि पहले एम्पलीफायर का इनपुट वोल्टेज 10 mV है, तो दूसरे चरण का आउटपुट _______ होगा।

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RRB ALP Mechanic Radio & TV 23 Jan 2019 Official Paper (Shift 3)
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  1. 25 V
  2. 2.5 V
  3. 125 V
  4. 100 V

Answer (Detailed Solution Below)

Option 2 : 2.5 V
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समाधान:

पहले एम्पलीफायर का लाभ, V1 = 10

दूसरे एम्पलीफायर का लाभ, V2 = 25   

दो चरण वाले कैस्केड एम्पलीफायर का कुल वोल्टेज लाभ दोनों चरणों के वोल्टेज लाभ के गुणनफल द्वारा दिया जाता है, अर्थात,

V = V1 × V2

   = 250

इनपुट सिग्नल वोल्टेज, Vi = 10 mV=0.01 V

माना दूसरे चरण का आउटपुट = Vo

 Vo=2.5 V

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