HALL EFFECT IN PHYSICS

Hall effect is the effect that

• when a current carrying conductor is placed perpendicularly uniform magnetic field

• when a conductor is placed in magnetic field

• voltage produced when a current conductor is placed perpendicular uniform magnetic field

Typical value of Hall voltage produced is about

• few volt

• few milivolt

• few nanovolt

• few kilovolt

What is/are the physical quantity(es) used in production of Hall voltage?

• Magnetic flux density

• electromagnetic wave

• Current

• induced emf

Potential difference will be produced when one side of the electric conductor accumulating negative charges and another side of the condutor with positive charges.

• True

• False

when current carrying conductor is placed ________________ with magnetic field strength, significant Hall voltage will be produced.

The application(s) of Hall effect is/are

• it can used to determine unknown magnetic field

• identify the type of semiconductor used

• to determine the amount of current that flow through the conductor

• it can used as Hall probe

Choose the correct formula for Hall voltage, in terms of thickness,t, charge,Q, current,I, number of charge density,n, and magnetic field strength, B.

•  $V_H=\frac{In}{tBq}$  

•  $V_H=\frac{BIn}{tq}$  

•  $V_H=\frac{IB}{qtn}$  

•  $V_H=\frac{BI}{nqt^2}$  

•  $V_H=\frac{IB}{ntq^2}$  

What is the BEST formula for magnetic force, F used in derivation for Hall voltage?

• F = (current, I) x (length,l) x (magnetic field,B)

• F = (current,I) x (length,l) x (velocity,v)

• F= (magnetic field, B) x (velocity,v) x (charge,q)

• F= (magnetic field,B) x (velocity,v) x (length,l)

Which of the formula is NOT to be used in derivation for Hall voltage?

• $E\ =\ \frac{V}{d}$

• $F\ =qE$

• $F\ =qvB$

• $I=nAqv_d$

• $v_d=\frac{E}{B}$

Diagram shows _________________ is produced.

• Capacitance effect

• Hall effect

• Resistance effect

• Photoelectric effect