The drift velocity of free electrons in a conductor is vd, when the current is flowing in it. If both the radius and current are doubled, the drift velocity will be
A. \(\frac {v_d}{8}\)
B. \(\frac {v_d}{4}\)
C. \(\frac {v_d}{2}\)
D. vd
Answer:C
The drift velocity of free electrons in a conductor is vd, when the current is flowing in it. If both the radius and current are doubled, the drift velocity will be
A. \(\frac {v_d}{8}\) B. \(\frac {v_d}{4}\) C. \(\frac {v_d}{2}\) D. vd