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QNEET-2013-Ph-1511: NEET 2013 Physics - Class 12 NEET-2013-Ph-1511 Solution: The internal resistance of a 2.1 V cell which gives a current…
The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of is
Multiple Choice Options
- A 0.8 �
- B 1.0 �
- C 0.2 �
- D 0.5 �
Step-by-Step Verified Solution
I = _ R + r
_ I R + I r = _
Here,
R = 10 � , r = ? , _ = 2.1 V , I = 0.2 A
_ 0.2 _ 10 + 0.2 _ r = 2.1
2 + 0.2r = 2.1
0.2r = 0.1 _ r = 1 2 = 0.5 �