List out the electrical appliances used in your home.
Electric lamps, fans, refrigerator, air-conditiones, TV, washing machine, water heater, electric iron.
Activity 2: From the following pictures, identify those use primary cell and secondary cell. Mark Primary cell as 'P' Secondary cell as 'S'.
Activity 3: Take a dry cell used in a flashlight or clock. Read the label and note the following
1. Where is the '+' and '–' symbol?
2. What is the output voltage?
Look at the cells that you come across and note down the symbols and voltage.
Electric Eel is a kind of fish which is able to produce electric current. This fish can produce an electric shock to safeguard itself from enemies and also to catch its food.
More to Know
Ammeter is an instrument used in electric circuits to find the quantity of current flowing through the circuit. This is to be connected in series.
Activity 4: Connect the objects given in the table between A and B and write whether the bulb glows or not.
More to Know
Thomas Alva Edison (February 11, 1847 October 18, 1931) was an American inventor. He invented more than 1000 useful inventions and most of them are electrical appliances used in homes. He is remembered for the invention of electric bulb.
Produce electricity using copper plates, zinc plate, connecting wires, key, beaker and porridge (rice water) [the older the porridge the better will be the current]
Arrange copper and zinc plates in series as shown in the figure. Half fill two beakers with porridge. Connect the copper plate with the positive of and LED bulb and zinc to the negative. Observe what happens.
Now you can replace porridge with curd, potato, lemon etc.