Electrostatics – two kinds of charges, Physics

Assignment Help:

Electrostatics – Two kinds of Charges

    Introduction:

If a glass rod is rubbed with silk cloth it acquires a positive charge, while silk cloth acquires an equal amount of negative charge.

  If an ebonite rod is rubbed with fur, it acquires a negative charge, while the fur acquires a positive charge.

This classification was done by the American scientist Benjamin Franklin.

Thus charging a rod by rubbing does not create electricity, but the charges are simply redistributed.

Like charges are repelled and unlike charges are attracted. This property has many applications such as powder coating, electrostatic paint sprayer etc. 

Positive Charge

Negative charge

Glass rod

Silk cloth

Fur

Ebonite rod

Woolen cloth

Plastic pen

Woolen carpet

Rubber shoes

 

The above table explains substances which acquire positive and negative charges on rubbing. 

MCQS based on the above concept:

1.    When we rub the glass rod with the silk, the silk acquires

A) positive charge    b) negative charge    c) both the charges

d) No charge

b) is the correct answer, because whenever a glass rod is rubbed with silk, the silk attains a negative charge.

2. The force between like charges is

a) Attraction    b) repulsion   c) No force

The correct answer is b)

The force exhibited by the like charges is force of repulsion. Only unlike charges attract each other.


Related Discussions:- Electrostatics – two kinds of charges

Kinematics, how to solve question for kinematics problem

how to solve question for kinematics problem

Ultraviolet catastrophe, Ultraviolet catastrophe: A shortcoming of the...

Ultraviolet catastrophe: A shortcoming of the Rayleigh-Jeans formula, that tries to explain the radiancy of a blackbody at several frequencies of the electromagnetic spectrum.

Newton, newton; N (after Sir I. Newton, 1642-1727) The derived SI unit...

newton; N (after Sir I. Newton, 1642-1727) The derived SI unit of force, explained as the force needed to give a mass of 1 kg an acceleration of 1 m/s 2 ; thus it has units of

Newtons Rings, What will be effect on radius Newton''s rings if air is repl...

What will be effect on radius Newton''s rings if air is replaced by oil between the lens and the glass plate

Write the maxwells electromagnetic equation, Write the Maxwell's electromag...

Write the Maxwell's electromagnetic equation, which follows from the non-existence of isolated magnetic pole

A floater to show surface tension, A floater to show surface tension Be...

A floater to show surface tension Bend a piece of small copper wire into a ring about 8 cm in diameter. Attach two other pieces of wire rigidly to conflicting sides of the ring

Equilibrium of charge, A charge is said to be in equilibrium, if total forc...

A charge is said to be in equilibrium, if total force performing on it is zero. A operation of charges is said to be in equilibrium if every charge is independently is equilibrium.

Optical microscopy, Determine whether you can examine a microstructure of d...

Determine whether you can examine a microstructure of dimension 10^(-3)mm distinctly with a magnifying lens of focal length 2cm,assuming that your eye has the average visual acuity

Piezoelectric behavior in solids, The world is derived from the Greek world...

The world is derived from the Greek world which means to squeeze or press. It is usually described as the generation of electricity as a result of mechanical pressure. "When mechan

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd