Which particles are responsible for current in conductors?

Which particles are mainly responsible for the mass of an atom?

The fundamental particle which are responsible for leping nucless togather is

The fundamental particle which are responsible for keeping nucleons together is

The exchange particles responsible for weak interactions are

n electrons flow through a cross section of a conductor in time t. If charge on an electron is e, then write an expression for the current in the conductor.

ColumnI lists physical quantities for a uniform current carrying conductor . These quantities depend on quantities given in column II. Match entries in column I to all the quantities in column II on which it depends. {:(,"Column I",,"Column II"),((A),"Resistivity",(p),"Length of conductor"),((B),"Current through the conductor for a given potential difference across the condcutor",(q),"Electric field in conductor"),(( C),"Current density in condcutor for a given potential difference across the conductor ",(r ),"Temperature of conductor"),((D),"Thermal power generated per unit volume for given value of potential difference across the conductor",(s),"Nature of conductor"),(,,(t ),"Area of condcutor"):}

Part (a): name and state the law which relates the potential difference and current in a conductor. What is the necessary condition for a conductor to obey the law named above in part (a)?

The charge of colloidal particles is responsible for the stability of sols. Explain.

If vec(j) and vec(E ) are current density and electric field respectively inside a current carrying conductor , then correct relation is

Which of the follwing characteristies of electrons determines the current in a conductor?