What is the magnitude of the current l in the circuit given?
(in the circuit, each side of triangle ABC has resistance equal to `30Omega`)

Options

A. `(1)/(2)A`
B. `(1)/(20)A`
C. `(1)/(25)A`
D. `(1)/(10)A`

Answer

D

Explanation

Resistance across AB is given by
`R= (30xx60)/(30+60)=(1800)/(90)=20 Omega`
Now, current is given by, `l=(2)/(20)=(1)/(10)A " "` (Here, E = 2 V)