NEET Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर NEET PYQ-Current Electricity Charging Capacitors

A charged particle having drift velocity of \[7.5\times {{10}^{4}}\text{ }m\text{ }{{s}^{1}}\] in an electric field of \[3\times {{10}^{10}}\text{ }V{{m}^{1}}\], has a mobility in \[{{m}^{2}}\text{ }{{V}^{1}}\text{ }{{s}^{1}}\]of:                                                                                                      [NEET 2020]

A) \[2.5\times {{10}^{6}}\]

B)      \[2.5\times {{10}^{6}}\]

C) \[2.25\times {{10}^{15}}\]

D)      \[2.25\times {{10}^{15}}\]

Correct Answer: A

Solution :

[a] Mobility, \[\mu =\frac{{{v}_{d}}}{E}\]

\[=\frac{7.5\times {{10}^{-4}}}{3\times {{10}^{-10}}}\]

\[=2.5\times {{10}^{6}}{{m}^{2}}{{V}^{-1}}{{s}^{-1}}\]