Electroscope, instrument for detecting the presence of an electric charge or of ionizing radiation, usually consisting of a pair of thin gold leaves suspended from an electrical conductor that leads to the outside of an insulating container.

A gold-leaf electroscope is used for detecting electric charge present in a body and identifying its polarity. Its operation is based on the principle of electrostatic induction and like charge repulsion. If a charged object is brought near to the plate, then the needle will gain the same charge and will swivel away.

An electroscope is a scientific instrument that is used to detect the presence and magnitude of electric charge on a body. There are three classical types of electroscopes: pith-ball electroscope (first), gold-leaf electroscope (second), and needle electroscope (third).

The principle of an electroscope is based on the atomic structure of elements, the internal structure of metal elements, charge induction, and the idea that like charges repel and opposite charges attract. All elements are composed of electrons, protons, and neutrons – with the electrons surrounding the nucleus.

Working of electroscope: When a charged electric rod is moved towards the metal knob. The polarity of the knob changes according to the charge of the rod. This changes charge of the metal leaves inside the container. When metal leaves conduct charges, the leaves repels and spreads out.

An electroscope can be charged using glass or rubber rods rubbed with silk or wool. The equipment required for a set of experiments involving an electroscope: When the glass rod is rubbed with silk, the silk strips electrons from the rod, leaving it a positive charge.

You can build your own electroscope at home using simple things you can find around the house, such as:

1. a glass jar,
2. 2 little pieces of aluminium foil cut into small round shapes (and you need to put a whole in one end of each foil);
3. A copper wire (spiral one of the ends of the wire to make a large surface area);

The leaves of an electroscope collapse as soon as we touch the metal cap with hand because the leaves of the charged electroscope lose charge to the earth through our body. This process is known as EARTHING.

if your electroscope dont work then check: 1)whether you have accumulated any charge or just sent them to ground. 3)make sure the aluminium does not have paper type non conductive layers on it.

The electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it.

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. When both the strips are charged with similar charges, they repel each other and become wide on.

William Gilbert

Answer: A tsunami is a very large and powerful wave. It is caused by earthquakes under the sea.

Answer: Tilly Smith was a British school girl. She was 10 years old and was able to save many lives when the tsunami struck Phuket beach in Thailand. That’s why she was awarded a number of awards.

Here’s the story of a 10-year-old girl named Tilly Smith who learned about tsunamis in school. Tilly shared what she learned when a tsunami was on its way to a beach where her family was taking a vacation.

Newton’s Law of Gravitation

Tall and thin, with a domed head and deeply lined brow, Macavity was the master of all crimes–big and small. He always had an alibi, which would prove that Macavity was never present at the scene of crime at all. he was truly unique and that is why teh poet says that ‘there is no one like Macavity’.

Velu felt miserable and exhausted because he had run away from his village two days ago and had not eaten anything except some peanuts and a piece of jaggery for the last two days.

Macavity