The GATE Grind

GATE 2022 IN – Question 17

Sensors and Industrial Instrumentation · Piezoelectric electromagnetic and Hall sensors · 1 mark · Multiple choice

A Hall sensor is based on the principle of ________

  1. Photoelectric effect
  2. Seebeck effect
  3. Piezoelectric effect
  4. Lorentz force

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Show answer and explanation

Correct answer: (D) Lorentz force

Explanation

Moving charge carriers experience magnetic Lorentz force q(v×B). Their transverse deflection produces a balancing electric field and Hall voltage.

Therefore **Lorentz force, D**.