Q: 28 (CDS-I/2017)

A copper wire of radius r and length I has a resistance of R. A second copper wire with radius 2r and length I is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
question_subject: 
Science
question_year: 
2017
question_exam: 
CDS-I