Topic: Semiconductors· Electronic Devices

The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.

1. current in n-type = current in p-type.

2. current in p-type > current in n-type.

3. current in n-type > current in p-type.

4. No current will flow in p-type, current will only flow in n-type.

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Answer: 3. current in n-type > current in p-type.

Key idea: \(I\propto n\,\mu\,E\), and the same concentration means the current depends on mobility.

In n-type the carriers are electrons, in p-type they are holes. Electrons have higher mobility than holes (\(\mu_e>\mu_h\)), so for the same concentration and field, the current in n-type is greater. Option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.

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