If the ratio of the concentration of electrons to that of holes in a semiconductor is 5 7 and the ratio of currents is 4 7 , then what is the ratio of their drift velocities?

Question:

If the ratio of the concentration of electrons to that of holes in a semiconductor is $\frac{7}{5}$ and the ratio of currents is $\frac{7}{4}$, then what is the ratio of their drift velocities?

  1. $\frac{5}{8}$

  2. $\frac{4}{5}$

  3. $\frac{5}{4}$

  4. $\frac{4}{7}$

Correct Option: 3

JEE Main Previous Year 1 Question of JEE Main from Physics Semiconductor Electronics : Materials, Devices and Simple Circuits chapter.
JEE Main Previous Year 2006

Solution:

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