In a p-type silicon sample, the hole concentration is 2.25

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In a p-type silicon sample, the hole concentration is 2.25 × 10¹⁵/cm³. If the intrinsic carrier concentration is 1.5 × 10¹⁰/cm³. The electron concentration is —

1. Zero
2. 10¹⁰/cm³
3. 10⁵/cm³
4. 1.5 × 10²⁵/cm³

Correct Option: C

Given: p = 2.25 × 10¹⁵ /cm³ NA
ni = 1.5 × 10¹⁰ /cm³

n_p		n_i²	=	(1.5 × 10¹⁰)²	= 10⁵/cm³
		N_A		2.25 × 10¹⁵