Consumer Electronics

Multiple Choice Questions

1. A preamplifier is necessary to
   1. the frequency response of the system
   2. the signal-to-noise ratio of the system
   3. the sensitivity of the system
   4. none of the above
2. Equalisation is best incorporated in a
   1. preamplifier
   2. power amplifier
   3. either (a) or (b)
   4. neither (a) nor (b)
3. The output impedance of the mixer is
   1. low
   2. moderate
   3. high
   4. very high
4. The hysteresis of the core results in the magnetic field being predominantly
   1. second harmonic
   2. third harmonic
   3. fourth harmonic
   4. none of the above
5. 100 Hz hum originates in the
   1. mains transformer
   2. recording head
   3. power supply
   4. playback head