Year: 2020
Topic: Current electricity
Time :
1.
A charged particle having drift velocity of \(7.5 \times 10^{−4}\,ms^{−1}\) in an electric field of \(3 \times 10^{−10}\, V\, m^{−1}\), has a mobility in \(m^2\,V^{−1}\,s^{−1}\) of
(1). \(2.5 \times 10^6\)
(2). \(2.5 \times 10^{−6}\)
(3). \(2.25 \times 10^{−15}\)
(4). \(2.25 \times 10^{15}\)