A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio \(\frac { R }{ R` } \) is –
A. \(\frac { 1 }{ 25 }\)
B. \(\frac { 1 }{ 5 }\)
C. 5
D. 25
Answer:D
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R’, then the ratio \(\frac { R }{ R` } \) is –
A. \(\frac { 1 }{ 25 }\) B. \(\frac { 1 }{ 5 }\) C. 5 D. 25