Question

n-p-n transistor are preferred to p-n-p transistor because they have

• A. low cost
• B. low dissipation energy
• C. capability of handling large power
• D. electrons having high mobility than holes

Answer 1

Answer: (D)

$n-p-n$ transistor is formed by combining two $n$-type crystals between which a thin $p$-type crystal is there. Electrons are charge carriers within the $n-p-n$ transistor whereas holes are charge carriers within the $p-n-p$ transistor. Since, electrons move more easily than holes, hence $n-p-n$ transistors are preferred compared to $p-n-p$.