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Series-Parallel Circuits

Q1:

If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?

A increases

B decreases

C remains the same

D cannot tell

ANS:B - decreases

Total I = i1+(i2+i3)....

If r2 is open then no current in that node and so total I= (i1+0+i3)...
So, overall current in circuit decreases.



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