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The frequency of flickers in an incandescent lamp at 220 V, 50 Hz supply will be

  • The frequency of flickers in an incandescent lamp at 220 V, 50 Hz supply will be 100 per second.
  • The flicker frequency of an incandescent lamp is determined by the frequency of the AC power supply that it is connected to.
  • In many countries, the standard AC power supply frequency is 50 Hz, which means that the voltage and current of the power supply are oscillating 50 times per second.
  • However, since the voltage oscillations in the power supply occur in both the positive and negative direction, the filament of an incandescent lamp will be cooling and reheating 100 times per second, resulting in 100 flickers per second (or 100 Hz).