Question

if (p-q+r) : (q-r+2s) : (2p+r-s) then find (2p -2s + 2r) : 3s = ?​

Answer 1

Answer:

The balanced condition for Wheatstones bridge is QP=SR

as is obvious from the given values.

No, current flows through galvanometer is zero.

Now, P and R are in series, so

Resistance,R1=P+R

=10+15=25Ω

Similarly, Q and S are in series, so

Resistance R2=R+S

=20+30=50Ω

Net resistance of the network as R1 and R2 are in parallel

i=RV=506×3=0.36 A.