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A battery of e mf 10 V and internal resi...

A battery of e mf 10 V and internal resistance `3Omega` is connected to a resistor as shown in the figure. If the current in the circuit is 0.5 A . then the resistance of the resistor will be

A

`13Omega`

B

`15Omega`

C

`17Omega`

D

`19Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
`I=(E)/(R+r)`
`0.5=(10)/(R+3)`
`10=0.5R+1.5`
`0.5R=8.5`
`R=(8.5)/(0.5)=17Omega`.
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