Question

1) What is the cause of conductivity in solids and liquids?

2) Why the bulb glows when electric current passes through it?

3) What all things should we remember while connecting LED to a circuit?

4) What is advantage of using LED over bulb in testing the electrical conductivity of Liquids?

5). Briefly explain the process of electrolysis with the help of an activity.

6). Explain how copper gets transferred from one electrode to other during electroplating. Write down the important points which should be remembered while electroplating.

7).For electroplating copper on an iron key, which terminal of the battery is connected to the iron key? Draw a neat and labelled diagram.

8). Which properties of chromium metal make it suitable for electroplating it on car bumpers, bath taps and bicycle hand bars, etc. made of iron?

Answer 1

Answer:

1) What is the cause of conductivity in solids and liquids?

1)ans- Ions are atoms or group of atoms with a positive or a negative charge. These ions cause electrical conduction through the liquid. A liquid That conducts electricity due to the presence of ions is called an electrolyte.

2) Why the bulb glows when electric current passes through it?

2)ans -The filament of a electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the filament which gives off light.

3) What all things should we remember while connecting LED to a circuit?

Answer 2

6,7,8 im not sure but the rest its there i had trouble uploading so i took a screenshot