Q72. A copper wire has length L and cross-sectional area A. Its resistance is R. If we halved the length and halved the diameter of wire, then what will be the resistance of this wire?Physics — Current Electricity — Question 72 of 484A. 4RB. 3RC. 2RD. RPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →