An alternating power of frequency 20 cycles per second is used to supply power to an electric bulb. Can we see the fluctuation in the bulb. ?

Explanation

To determine if we can see the fluctuation in an electric bulb powered by an alternating current (AC) supply with a frequency of 20 cycles per second, we can follow these steps:

### Step 1: Understand the Frequency of the AC Supply
The frequency of the AC supply is given as 20 cycles per second. This means that in one second, the AC voltage completes 20 full cycles.

### Step 2: Determine the Number of Times the Voltage is Zero
In one complete cycle of an AC waveform (which is typically sinusoidal), the voltage goes from maximum to zero, back to maximum, and then to zero again. Therefore, in one cycle, the voltage is zero twice.

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