
- A$3$
- ✓$4$
- C$40$
- D$8$

$3 V _{0}-12=0$
$V _{0}=4$
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$A.$ It is a heavily doped p-n junction.
$B.$ It emits light only when it is forward biased.
$C.$ It emits light only when it is reverse biased.
$D.$ The energy of the light emitted is equal to or slightly less than the energy gap of the semiconductor used.
Choose the correct answer from the options given below :
Statement $I$ : The electric force changes the speed of the charged particle and hence changes its kinetic energy: whereas the magnetic force does not change the kinetic energy of the charged particle
Statement $II$ : The electric force accelerates the positively charged particle perpendicular to the direction of electric field. The magnetic force accelerates the moving charged particle along the direction of magnetic field. In the light of the above statements, choose the most appropriate answer from the options given below

