Show that if the two electrodes of an electric cell are short circuited then no potential difference will exist between them.

Define-electric current what is the S.I. unit of potential difference?

When the two electrodes of an electric cell are connected directly with a voltmeter,it gives a reading of 1.2 V,State whether this value can be called the emf of the cell?

Show that, the unit of the product of electric current and potential difference is identical ot the unit of power .

Write two differences between potential difference and EMF.

The distance between the two plates of an isolated charged parallel plate air capacitor is increased. The potential difference between the plates will……………………..

Write three difference between e.m.f and potential difference.

Write the S.I. unit of electric potential difference?

If a current passes through a metal conducting wire of area of cross section A, the drift velocity of free electrons inside the metal is v_d=1/( n e A) , where the amount of electric charge of an electron =e and the number of free electrons per unit volume of the metal=n. The applied electric field on the wire is E=V/l , where a potential difference V exists between two points, l apart, along the length of the wire. IF R is the resistance of the wire between those two points, then the resistivity of its material is rho=(RA)/l .Besides the mobility (mu) of the free electrons inside a wire is defined as their drift velocity for a unit applied electric field. The radii of two wires of the same metal are in the ratio 1:2 The same potential difference is applied between two points at a distance l on each of the wires.The ratio between the drift velocities of the free electrons in two wires is

Is electric potential difference a scalar quantity?