Question

SUBJECT: SCIENCE (MCQs)

PHYSICS

1.ELECTRICITY

1.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 R/R ispiece 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 R/R is

(a) 1/25 (b) 1/5 (c) 5 (d) 25​

Answer 1

Explanation:

we know that each part is connected to each other in parallel ,hence the equivalent resistance can be calculated as follows:

1/r=5/r+5/r+5/r+5/r+5/r=25/r

R/R=25

the ratio of R/R is 25