Question

A battery supplies a current of 0.9 A through a 2.0 resistor and a current of 0.3A through a 7.0 ohm resistor.Calculate the emf and the internal resistance of the battery

Answer 1

Answer:

the answer 0.52thankyou

Explanation:

Correct option is

A

0.5Ω

Using the relation,I=  

(R+r)

E

​

 

We have,

0.9=  

(r+2)

E

​

 

0.3=  

(r+7)

E

​

 

On dividing both the equation it will give,

r=0.5 ohm.

Answer 2

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