PHY301 Quiz 2 Solution 

1) When germanium crystal is doped with phosphorus atom, it becomes

1. Photo-transistor
2. Insulator
3. P-type semiconductor
4. N-type semiconductor

2) The bonding force of atoms of semiconductors is

1. Covalent bonding
2. Ionic bonding
3. Van der wools bonding
4. Metallic Bonding

3) Using exponential model, for a diode that conducts at ImA with n=2, the change in current due to change of voltage by 5mv will be

1. 0.4mA
2. 0.8mA
3. 0.11mA
4. 3mA

4) In semi-conductor production, the process of intentional introduction of Impurities into an intrinsic semiconductor for the purpose of improving its electrical, optical properties, is called

1. Doping
2. Overlapping
3. Modulation
4. Mixing

5) In forward biased Characteristics of junction diode, current value is:

1. i=lse^v/vT
2. ls=ie^V/VT
3. i=lSe^V/VT
4. i=lse^VT/V