1. Hall coefficient R_H is directly proportional to the charge density
2. R_H depends upon type of the semiconductor material (n - type or p - type)
3. Hall co-efficient R_H is directly proportional to hall voltage V_H

Assertion (A): 2's complement arithmetic is preferred in digital computers

Reason (R): The hardware required to obtain 2's complement is simple.

1. increases with Q increasing frequency
2. varies linearly with frequency
3. increase with increasing frequency because R increases at high frequency
4. decrease after the peak frequency because R increases at H.F. the correct statements are