Suppose the `19 (Omega)` resistor the previous problem is disconnected. Find the current through `P_(2) Q_(2)`.
Both the wires moves towards right

Options

A. zero
B. 3 mA
C. 1 mA
D. None of these

Answer

C

Explanation

No current will pass as circuit is incomplete.
When circuit is complete
`V_(P_(2)Q_(2))=Blv`
`=1 xx 0.04 xx 0.05 = 2 xx 10^(-3) V`
`R=2 Omega` ltbgt `i-(20 xx 10^(-3))/(2) = 1 xx 10^(-3)A=1mA`.