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In the figure shown , the current in ...


In the figure shown , the current in the 10 V battery is close to :

A

0.71A from positive to negative terminal

B

0.42 A from positive to negative terminal

C

0.21 A from positive to negative terminal

D

0.36 A from negative to positive terminal

Text Solution

Verified by Experts

The correct Answer is:
C

`-5i_(2) -10(i_(1) + i_(2)) - 2i_(2) + 20 = 0`
`-10i_(1) - 17i_(2) + 20 =0`
`-10 + 4i_(1) + 10(i_(1) + i_(2))=0`
`14i_(1) + 10i_(2) + 10 =0`
`10i_(1) + 17i_(2) = 20 to xx 10`
`14i_(1) + 10i_(2) = 10 to xx 17`
`-138i_(1) = 30`
`i_(1) = -30/138 = -0.217`
`i_(1)` is negative it means current flows from positive to negative terminal.
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