For the circuit shown, what is the voltage V if the source voltage is reduced by 50%?
Match List-I with List-II and select the correct answer using the code given below the lists:
Which one of the following is the correct statement?
During the process of magnetization of ferromagnetic material, the magnetic domains
a. Only expand
b. Rotate first and then expand
c. Expand first and then rotate
d. Neither rotate nor expand
Consider the following statements about p-n junctions:
1. p-n junction behaves as a capacitor when forward biased.
2. p-n junction has p and n type semiconductors with depletion layer in between.
3. p-n junction has a wider depletion layer as compared to a Zener diode.
Which one of the following is the correct statement?
When a p-n junction is reverse-biased,then
a. Holes and electrons move away from the junction
b. Depletion region decreases
c. Barrier breaks down
d. Minority carriers are not affected
Consider the following statements about semiconductors?
1. The forbidden energy gap in semiconductors lies between the valence band and conduction band.
2. The forbidden energy gap in germanium at 0 K is about 0.72 eV.
Fermi level in a p-type semiconductor lies close to which one of the following?
a. The top of the valence band
b. The bottom of the valence band
c. The top of the conduction band
d. The bottom of the conduction bond
Which one of the following is the correct statement?
The type of majority charge carriers in a semiconductor can be found by
a. Hall effect
b. Piezoelectric effect
c. Photoelectric effect
d. Meissner effect
Materials which lack permanent magnetic dipoles are known as:
a. Paramagnetic
b. Diamagnetic
c. Ferromagnetic
d. Ferrimagnetic
Why is the core of the transformer built up of lamination?
a. To reduce eddy current loss
b. For convenience of fabrication
c. No specific advantage
d. For increasing the permeability
