Question

What is the basic principle of electric pen ? Explain how it can be used for writing.​

Answer 1

Answer:

It is connected to negative terminal of the battery using a lead and clip. Another lead is connected to positive terminal of the battery. The power lies between 6 to 12 V. When the power is switched on, the lead connected to positive terminal can be used for writing on the filter papers kept on aluminium sheet.

Answer 2

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Principle of electric pen: It makes use of electricity. The pen is attached to a wet cell battery which in turn is attached to an electric motor. When current is passed through it, the pen makes 50 punctures per second. An electric pen is a device made from electrolysis of potassium iodide solution.