Textbook ExpertVerified Tutor
29 Nov 2021
Given information
Let internal resistance of a Mercury cell is 
and emf E = 1.35 V.
and internal resistance of dry cell is 
and emf E = 1.5 V.
Effective power of hearing aid P = 2.5 W and Voltage required V = 4 V.
Step-by-step explanation
Step 1.
The current required for the hearing aid is given as,
Now the resistance of Hearing aid is given as,
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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922
Solutions
Chapter
Section
- Problem 67
- Problem 68a
- Problem 68b
- Problem 69
- Problem 69a
- Problem 69b
- Problem 69c
- Problem 70
- Problem 71
- Problem 72a
- Problem 72b
- Problem 72c
- Problem 73a
- Problem 73b
- Problem 74
- Problem 74a
- Problem 74b
- Problem 75
- Problem 76
- Problem 77
- Problem 78
- Problem 79a
- Problem 79b
- Problem 80
- Problem 81
- Problem 82a
- Problem 82b
- Problem 83
- Problem 84a
- Problem 84b
- Problem 84c
- Problem 84d
- Problem 85a
- Problem 85b
- Problem 86a
- Problem 86b
- Problem 86c
- Problem 86d
- Problem 87
- Problem 88a
- Problem 88b
- Problem 88c
- Problem 89
- Problem 90
- Problem 91a
- Problem 91b
- Problem 91c
- Problem 92
- Problem 93
- Problem 94
- Problem 95a
- Problem 95b
- Problem 96
- Problem 97