Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a. by gradually increasing the brightness (amount) of light that we shine on it. b.by gradually increasing the frequency of the light we shine on it. c.by gradually increasing the wavelength of the light that we shine on it.

Answer : By gradually increasing the brightness of light that we shine on it.

Explanation : Solar panel also known as photo-voltaic. photo means light and voltaic means electricity.

In photoelectric effect ejection of electron, when the sun rays hit a silicon crystal then the electron inside of the solar panel start to jump up and down. when electron flow through such a circuit then the solar panel generate electricity.

So, we can say that when we will gradually increase the brightness of light then the current will gradually increase.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.