If V = 12R / (r + R) , then R =
A. Vr / (12 - V)
B. Vr + V /12
C. Vr - 12
D. V / r - 12
E. V (r + 1) /12

• A. Vr / (12 - V)
  
  If V = 12R / (r + R)
  V(r+R) = 12R
  R = Vr / (12 - V) ... option A
• 12 years agoHelpfull: Yes(5) No(0)
• V=12R / (r+R) -GIVEN
  V(r+R)=12R
  Vr+VR=12R
  Vr=12R-VR
  Vr=R(12-V)
  Vr / (12-V) = R (OPTION A)
• 8 years agoHelpfull: Yes(1) No(0)
• vr=12R-vR;
  vr=R(12-v)
  
  R=vr/(12-v)
  
• 9 years agoHelpfull: Yes(0) No(0)
• Ans...is op (A)
  
  v= 12R/r+R
  vr+vR=12R
  vr=12R-vR
  vr=R(12-v)
  vr/(12-v)=R
• 4 years agoHelpfull: Yes(0) No(0)
• rV+RV=12R
  rV=R(12-V)
  R=rV/12-V
  option -A
• 4 years agoHelpfull: Yes(0) No(0)