Is bandwidth just frequency?

Bandwidth is completely related to frequency but definitely, bandwidth is not frequency . However, bandwidth is the range of frequencies. Bandwidth is defined as the difference in the upper and lower frequency components present in a signal. Thus, it specifies the amount of data being transmitted per second.

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What is cutoff frequency of transistor?

beta cut-off frequency (fβ) is a particular frequency that occurs when the common-emitter current gain (β) value drops to 0.707 of its low-frequency value . The common-emitter current gain is the ratio of the value of the transistor’s collector current to the value of the transistor’s base current in a transistor.

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