Experiments

To measure the voltage, we simply need to select the DC function on our multimeter, and then we connect the red lead to the positive terminal and the black lead to the negative.

The balloon that has been rubbed on your hair or clothing has collected electrical charges that we refer to as static electricity. When you move the balloon close to the CFL lightbulb the static electricity of the balloon begins to interact with the electrons inside and the light bulb illuminates

The electroscope is an early scientific instrument used to detect the presence of electric charge on a body. 

Water molecules are polar, they have a negative and a positive end. The negatively charged object attracts the positive end of the water molecules making the stream of water bend.

When a balloon is rubbed against a piece of wool or hair, it picks up electrons and becomes negatively charged. This negatively charged balloon can then attract neutral objects like paper. The negatively charged balloon attracts the neutrally charged paper by first repelling the negative charges away, which leaves the positive charges closer to the balloon. Since opposites attract, the paper is attracted to the balloon and is picked up.

When two straws are rubbed with a woolen cloth, they acquire the same kind of charge. The charges in the neutral straw get redistributed in such a way that opposite charges (opposite to the charge on the charged straw) come close to the charged straw. The attraction is caused by the attractive force between the induced charges and charges on the charged straw

Electrostatics is the study of electric charges at rest. It involves the forces between charges, the electric fields created by charges, and the resulting potential energy. Key concepts include Coulomb’s Law, which describes the force between two charges, and the concept of an electric field, a region around a charged particle where a force would be exerted on other charged particles. Electrostatic phenomena are evident in everyday life, from static electricity in clothing to the operation of electronic devices. 

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. Electric charge can be positive or negative.

The faster an object vibrates, the higher the pitch of the sound. The length and thickness of the vibrating object also affects its pitch.

Slinky coil can be used to demonstrate longitudinal wave. In longitudinal wave, the direction of the wave is parallel to the direction of the vibration of the particle.