(1)_________
an American scientist, showed that lightning and the
spark from polyester clothes when it is taken off are the same phenomena.
(2) The like charges _____
each other.
(3) Positive charge and negative charge_______
each other.
( 4 ) The electric charges generated by rubbing a plastic comb with dry hair
are called___________
charges.
(5) When charges move, they constitute a/an
(6)
device is used to test whether an object carries a charge
or not.
(7) The electrical discharge occurring between two or more clouds or between
clouds and the earth produces
(8) A______________
can protect the building from lightning strike.
Answers
Answer:
1. You might have seen that when you take off woollen or polyester clothes, your hair stands on ends. ... In 1752 Benjamin Franklin, an American scientist, showed that lightning and the spark from your clothes are essentially the same phenomena. However, this realisation took 2000 years
2. Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge. The attraction or repulsion acts along the line between the two charges
3. Any charged object - whether positively charged or negatively charged - will have an attractive interaction with a neutral object. Positively charged objects and neutral objects attract each other; and negatively charged objects and neutral objects attract each other.
4. Similarly, when a plastic comb is rubbed with dry hair, it acquires a small charge. These objects are called charged objects. In the process of charging the refill and the plastic comb, polythene and hair also get charged.
5.When charges move, they constitute an electric current. Electroscope; It is a device that can be used to test whether an object is carrying charge or not. Electroscope consists of closely placed two metallic (aluminium) foils or strips.
6 . Electroscope; It is a device that can be used to test whether an object is carrying charge or not. Electroscope consists of closely placed two metallic (aluminium) foils or strips
7. The process is known as electric discharge. ne process of electric discharge between different clouds or between clouds and the earth causes lightning.
8.Lightning conductor is a device used to protect a building from the effects of lightning. A lightning conductor is made of a thick strip of metal (usually of copper). The top end of lightning conductor is pointed like a sharp spike (or spikes) and it is fixed above the highest point of the building.
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