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four cells each of emf 2V and internal resistance 1ohm are connected in parallel with an external resistance of 6ohm.The current in the external resistance is?

four cells each of emf 2V and internal resistance 1ohm are connected in parallel with an external resistance of 6ohm.The current in the external resistance is?
 

Grade:12

2 Answers

Arun
25758 Points
3 years ago
I) As cells are in parallel, the battery has net emf of 1.5 V and its net internal resistance, r is given by 
1/r = 1 + 1 + 1 + 1= 4 => r = 0.25 ohm. 
(ii) total resistance, R = 0.25 + 6 = 6.25 ohm
(iii) current flowing in the external circuit is
I = 2 / R = 2 / 6.25 = 0.32A
 
Khimraj
3007 Points
3 years ago
 
 battery has net emf of 2 V and its net internal resistance, r is given by 
1/r = 1 + 1 + 1 + 1= 4 => r = 0.25 ohm. 
R = 0.25 + 6 = 6.25 ohm
current 
I = 2 / R = 2 / 6.25 = 0.32A

 

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