Question 41:
easyWhen n-type semiconductor is heated
(1989)
When any semiconductor is heated, thermal energy breaks covalent bonds, generating equal numbers of electrons and holes simultaneously. Thus, both electron and hole concentrations increase equally.[cite: 1]
Question 42:
easyOne part of a device is connected with the negative terminal of a battery and another part is connected with the positive terminal of a battery. If their ends now altered, current does not flow in circuit, then the device will be:
(1998)
A P-N junction diode allows current to flow when forward-biased and blocks it when reverse-biased. Altering the battery terminals switches it from a forward to a reverse-biased state, matching this unidirectional behavior.
Question 43:
easyThe depletion layer in the p-n junction region is caused by
(1991)
Due to the concentration gradient across the junction, majority charge carriers diffuse across the boundary. This diffusion depletes the region of mobile charges, creating the depletion layer.