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In above circuit if current through 10 O...


In above circuit if current through 10 `Omega` resistor is 2.5 A, value of R is .... .

A

` 50 Omega`

B

`40 Omega`

C

`8 Omega`

D

`10 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
`i_1 = 2.5 A `
so `i=i_1+i_2`
So voltage across `10 Omega = i xx R = 25`
Voltage across `40 Omega=10xx2.5=25 V`
`R=(25)/(i_1+ i_2)`
`i_2=25/40A`
`thereforeR=8Omega`
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