Question

A 50 V battery is connected across a 10 Ω resistor, the current is 4.5 A. The internal resistance of the battery is ________Ω.

Answer 1

Answer:

1.1 Ohm

EXPLANATION:

E =4.5A , V =50v , R=10 ohm, r =?

E=V/R+r

4.5=50/10+r

45+4.5r=50

r=5/4.5

r=1.1ohm

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Answer 2

Answer:

50=4.5(10+r)

Here we have to multiply 4.5 with the no in brackets4.5(10+r) and write it down seperately

So it becomes now,

4.5r=50-45=5

r=5/4.5=50/45=10/9=1.1 ohm