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Grade 12Electric Current

When two idenical batteries of int. resistance 1ohmeach are connected in series across a resistor R is J₁. When the same batteries are connected in parreel across R the rate is J₂. If J₁=2.25J₂ the value of R in ohms is-

savyasanchi

10 Years agoGrade 12

1 Answer

Vikas TU

10 Years ago

in series,

J1 = 4E^2/(R+2)

and

in parallel,

net emf = (E/1 + E/1)/(1/1 + 1/1) = > 2E/2 = E

J2 = E^2/R

Now it is given J1 = 2.25J2

put both J1 and J2 values and get the value of R.

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