# The Hall Effect MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “The Hall Effect”.

1. Which of the following parameters can’t be found with Hall Effect?
a) Polarity
b) Conductivity
c) Carrier concentration
d) Area of the device

2. In the Hall Effect, the electric field is in x direction and the velocity is in y direction. What is the direction of the magnetic field?
a) X
b) Y
c) Z
d) XY plane

3. In the Hall Effect, the directions of electric field and magnetic field are parallel to each other.
The above statement is
a) True
b) False

4. What is the velocity when the electric field is 5V/m and the magnetic field is 5A/m?
a) 1m/s
b) 25m/s
c) 0.2m/s
d) 0.125m/s

5. Which of the following formulae doesn’t account for correct expression for J?
a) ρv
b) I/wd
c) σE
d) µH

6. Calculate the Hall Effect coefficient when number of electrons in a semiconductor is 1020.
a) 0.625
b) 0.0625
c) 6.25
d) 62.5

7. Calculate the hall voltage when the Electric Field is 5V/m and height of the semiconductor is 2cm.
a) 10V
b) 1V
c) 0.1V
d) 0.01V

8. Calculate the Hall voltage when B=5A/m, I=2A, w=5cm and n=1020.
a) 3.125V
b) 0.3125V
c) 0.02V
d) 0.002V

9. What is the conductivity when the Hall Effect coefficient is 5 and mobility is 5cm2 /s.
a) 100 S/m
b) 10 S/m
c) 0.0001S/m
d) 0.01 S/m

10. In Hall Effect, the electric field applied is perpendicular to both current and magnetic field?
a) True
b) False