Question

In which of the given centrifuge rotors the value of \( r_{{min}} \) (radius minimum), \( r_{{max}} \), and \( r_{{av}} \) have the minimum deviation?

• A. Fixed-angle rotor only
• B. Vertical rotor only
• C. Swing rotor only
• D. Fixed-angle and Vertical rotors

Hint:

Vertical rotors are best suited for minimizing deviation in radii during centrifugation, making them ideal for precision separation tasks.

Answer 1

The Correct Option is B

To address this question, we need to understand the behavior of the radii (r_min, r_max, and r_av) in different centrifuge rotors.

Fixed-angle rotor:

The fixed-angle rotor maintains a constant angle during rotation. In this case, the radii r_min, r_max, and r_av typically have minimal variation from their expected values due to the fixed angle. However, some deviation can still occur depending on the rotor design and angle.

Vertical rotor:

In a vertical rotor, the axis of rotation is perpendicular to the horizontal plane. The sample tubes remain parallel to the axis, keeping the radial distance relatively constant. Thus, the deviation in the values of r_min, r_max, and r_av is minimal.

Swing rotor:

A swing rotor behaves differently as it swings the tubes outward during rotation. This movement causes significant variation in the radial distances, leading to a greater deviation in r_min, r_max, and r_av.

Conclusion:
The Vertical rotor provides the minimum deviation in r_min, r_max, and r_av compared to fixed-angle and swing rotors.