When determining the common-emitter current gain by making

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When determining the common-emitter current gain by making small changes in direct currents, the collector voltage is held constant so that—

1. The output resistance will be high
2. The transistor will not burn out
3. The change in emitter current will be due to a change in collector current
4. The change in collector current will be due to a change in base current

Correct Option: D

NA