If the radius of a copper wire carrying a current is doubled. The drift velocity of the electron will be:

Question

If the radius of a copper wire carrying a current is doubled. The drift velocity of the electron will be: (A) increase first then decrease (B) remain same (C) increase four time (D) decrease four times

Tardigrade Admin · Accepted Answer

The relation for drift velocity i=ne upsilon dA From it when current is constant A upsilon d is constant when radius is doubled, area becomes four times. Hence the drift velocity become one fourth ( (1/4) ) .

Q. If the radius of a copper wire carrying a current is doubled. The drift velocity of the electron will be:

increase first then decrease

remain same

increase four time

decrease four times

The relation for drift velocity $i = n e υ_{d} A$ From it when current is constant $A υ_{d}$ is constant when radius is doubled, area becomes four times. Hence the drift velocity become one fourth $(\frac{1}{4})$ .

Q. If the radius of a copper wire carrying a current is doubled. The drift velocity of the electron will be:

increase first then decrease

remain same

increase four time

decrease four times

The relation for drift velocity i=neυd​A From it when current is constant Aυd​ is constant when radius is doubled, area becomes four times. Hence the drift velocity become one fourth (41​) .

The relation for drift velocity $i = n e υ_{d} A$ From it when current is constant $A υ_{d}$ is constant when radius is doubled, area becomes four times. Hence the drift velocity become one fourth $(\frac{1}{4})$ .