HBSE 2020

The ionization energy of hydrogen atom is :

• 13.6 j
• 13.6 eV
• 1 eV
• 10 eV

Which dopant cannot be used to make silicon (Si) a p-type semi-conductor ?

• In
• Al
• B
• P

Which of the following has lowest wavelength?

• Gamma rays
• X-rays
• Infrared rays
• Short radio waves

Which of the following has highest frequency ?

• Gamma rays
• X-rays
• Infrared rays
• Short radio waves

The energy of an atom in ground state is –3.4 eV. The ionisation energy of this atom is :

• 1.7 eV
• 6.8 eV
• 3.4 eV
• 5.1 eV

Which dopant cannot be used to make Germanium (Ge) an n-type semiconductor?

• P
• In
• As
• Sb

Which spectral series of hydrogen atom lies in the ultraviolet region ?

• Lyman
• Balmer
• Paschen
• Brackett

Which dopant cannot be used to make silicon (Si) an n-type semi-conductor ?

• B
• As
• P
• Sb

Which of the following has highest wavelength ?

• Gamma rays
• X-rays
• Ultaviolet Rays
• Radio waves

Which dopant cannot be used to make Germanium (Ge) a p-type semiconductor ?

• P
• In
• B
• Al