Question
State the conclusion of experiments about Iriction charge.
✓
Answer
►The experiments about friction charge suggested that there are two kinds of electrification : (i) like charges repel and (ii) unlike charges attract each other.
►The property which differentiates the two kinds of charges is called the polarity of the charges.
►The experiments also demonstrated that the charges are transferred from the rods to the pith balls on contact. It is said that the pith balls are electrified or are charged by contact.
►When a glass rod is rubbed with silk, the rod acquires one kind of charge and the silk acquires the second kind of charge.
►Now if the electrified glass rod is brought in contact with silk, with which it was rubbed, they no longer attract each other.
►Thus, the charges acquired after rubbing are lost when the charged bodies are brought in contact.
►These observations just tell us that unlike charges acquired by the objects neutralise or nullify each other's effect.
►The property which differentiates the two kinds of charges is called the polarity of the charges.
►The experiments also demonstrated that the charges are transferred from the rods to the pith balls on contact. It is said that the pith balls are electrified or are charged by contact.
►When a glass rod is rubbed with silk, the rod acquires one kind of charge and the silk acquires the second kind of charge.
►Now if the electrified glass rod is brought in contact with silk, with which it was rubbed, they no longer attract each other.
►Thus, the charges acquired after rubbing are lost when the charged bodies are brought in contact.
►These observations just tell us that unlike charges acquired by the objects neutralise or nullify each other's effect.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In Ampere's $\oint\overrightarrow{\text{B}}.\text{d}\overrightarrow{\text{l}}=\mu_0\text{i},$ the current outside the curve is not included on the right hand side. Does it mean that the magnetic field B calculated by using Ampere's law, gives the contribution of only the currents crossing the area bounded by the curve?
→Both the springs shown in figure are unstretched. If the block is displaced by a distance x and released, what will be the initial acceleration?
A ray PQ incident on the refracting face BA is refracted in the prism BAC as shown in the figure and emerges from the other refracting face AC as RS such that AQ = AR. If the angle of prism A = 60o and refractive index of material of prism is$\sqrt{3}$, calculate angle $\theta.$ 
→Give the characteristics of magnetic field lines.
An electric bulb marked 220V, 100W will get fused if it is made to consume 150W or more. What voltage fluctuation will the bulb withstand?
A metre scale is graduated at every millimetre. How many significant digits will be there in a length measurement with this scale?
A parallel beam of monochromatic light falls normally on a single narrow slit. How does the angular width of the principal maximum in the resulting diffraction pattern depend on the width of the slit?
Compare the direction of the magnetic field inside a solenoid with that of the field there if the solenoid is replaced by its equivalent combination of north pole and south pole.
Find the minimum and maximum wavelengths of sound in water that is in the audible range (20-20000Hz) for an average human ear. Speed of sound in water = 1450m/s.
A photographic film is coated with a silver bromide layer. When light fells on this film, silver bromide molecules dissociate end the film records the light there. A minimum of 0.6eV is needed to dissociate a silver bromide molecule. Find the maximum wavelength of light that can be recorded by the film.