555555555520. An amplifier rated at 30-W output is connected to a 5- speaker. Calculate the input power required for full power output if the power gain is 20 dB. (a) 3 mW (b) 30 mW (c) 300 mW (d) 3 W
555555555548. A change in frequency by a factor of 10 results in a ________ change in the ratio of the normalized gain. (a) 3-dB (b) 6-dB (c) 10-dB (d) 20-dB
Tags: db, frequency, bjt, fet, response, gain, electronics, engineering
555555555526. An amplifier has an input signal voltage of 0.054 mV. The output voltage is 12.5 V. The voltage gain in dB is (a) 53.6 dB. (b) 107.3 dB. (c) 231 dB. (d) 116 dB.
Tags: db, voltage, frequency, response, input, output, gain, electronics, engineering