Why is an N-channel MOSFET preferred over a P-channel MOSFET?

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RRB ALP CBT 2 Electronic Mechanic Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. Because it allows fast switching
  2. Because it is TTL compatible. 
  3. Because of its low input impedance.
  4. Because of the low noise. 

Answer (Detailed Solution Below)

Option 1 : Because it allows fast switching
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  • The mobility of electrons, which are carriers in the case of an n-channel device, is greater than that of holes, which are the carriers in the p-channel device.
  • Thus an n-channel device is faster than a p-channel device.
  • The N-channel transistor has lower on-resistance and gate capacitance for the same die area.
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