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1  - The unit of frequency is Hertz
2  - The unit of resistance is Ohm
3  - The device which makes or breaks a circuit is Switch
4  - The path of an electric current is known as a Circuit
5  - Device which opposes the flow of electric current is known as Resistor
6  - Arc Lamp was invented by C.F.Brush
7  - Television was invented by J.L.Baird
8  - Transistor was invented by J.Bardeen,W.Shockley and W.Brattain
9  - The unit of wavelength of light is Angstrom
10 - A device which converts light into electricity is known as Photo cell

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