What is frictional force, Physics

The substances which acquire charges on rubbing are said to be charged. The electricity produced by friction is called Frictional force.  If the charges do not move, then the frictional electricity is known as Static electricity.

MCQs based on the above Concept:

1.    The force produced due to the static charges is called

a)    Dynamic current     b) Current   C) Static Current  

d) None of these

The correct answer is b) Current

i)                  This is because only if the charges are moving it can be a dynamic current

ii)               If the charges are not moving it is static current.

iii)  But if it is moving or not, it still exerts some force, which is called as current.

2.    When the amber is rubbed with fur, it absorbs bits of papers. This was invented by

a)    Amber      b) Thales    c)William Gilbert    d) Benjamin Franklin

The correct answer is b) Thales

1.    Amber is a material.

2.    William Gilbert later found that glass and ebonite possess tha attracting property when it is rubbed.

3.    Benjamin Franklin classified these charges as positive and negative charges

Posted Date: 7/23/2012 4:05:20 AM | Location : United States

Related Discussions:- What is frictional force, Assignment Help, Ask Question on What is frictional force, Get Answer, Expert's Help, What is frictional force Discussions

Write discussion on What is frictional force
Your posts are moderated
Related Questions
De Broglie wavelength (L. de Broglie; 1924) The prediction which particles also have wave characteristics, where the effective wavelength of an element would be inversely propo

(a) Using the thermochemical tables provided, calculate the standard molar enthalpy of combustion at 298 K for the following hydrocarbon:  C C 2 H 4 (g ) (ethene)  (b)  If

Historical development of atomic models In olden days there was an idea that all matter is made of tiny indivisible particles. When Thomson discovered electron, this idea

Define Isothermal Compression and Adiabatic Expansion of Ideal Gas ? An ideal gas is dense at constant temperature from volume v 1 to volume v 2. a) Calculate the work

High temperatures and pressures are given for the following power plants. ISU co-generation:   400 psi, 750F City of Ames with RDF:   700 psi, 850F Super-critical power pl

Explain the types of polymorphism In terms of  thermodynamics, there are two kinds of polymorphism. For a monotropic system, a plot of the free energy of the various polymorphs

When a liquid moves by a pipe having a varying diameter, the pressure against the inside walls of the pipe will be: a)  The same throughout b)  Lowest where the diameter is

Describe how Dewar flasks limit energy transfer A Dewar flask (thermos)  is a device that resists energy transfer. Explain how Dewar flasks limit energy transfer by listing the

Hello, Placing a smooth walled cone, say for now, a 24" diameter intake x 96" in length that smoothly tapers to an 1-1/2" diameter outlet, (a drogue placed 48" deep at the centerl