The maximum operating temperature range for the 2N3904 is -55°C to 150°C.
Yes, the 2N3904 can be used as a switch, but it's not recommended for high-frequency switching applications due to its relatively slow switching time.
The maximum collector current rating for the 2N3904 is 200mA.
No, the 2N3904 is not suitable for high-voltage applications, as its maximum collector-emitter voltage rating is 40V.
Yes, the 2N3904 can be used in a linear amplifier circuit, but it's not recommended for high-gain or high-frequency applications due to its limited bandwidth.