engineering recuitment BHEL Engineer Trainee Mock Test 2025 Electronic Devices Bipolar Junction Transistor Minority Carrier Distribution
A Si wafer is doped with 1015 phosphorus atoms per cm-3. Find the hole concentration at room temperature (300°k), assume ni = 1.5 × 1010/cm3 at 300 K.
1
5 × 106/cm3
2
2.25 × 105/cm3
3
3 × 1015/cm3
4
2.25 × 1015/cm3