Question

state Ohms law.write the necessary condition for its validity. how is this law verified experimentally? what will be the nature of graph between potential difference and current for a conductor? name the physical quantity that can be determined from this graph

Answer 1

it state that at constant temperature the current flowing through a counductor of uniform area of crosssection is directly proportional tothe difference of potrntial across the two ends of the counduction.
v/i=R

a) by using voltmeter and ammeter
b) using a tangent galvanometer


according to ohms law I is proportional to v
v/i=constant
let v=eV/ml× tow
we know that I =naev
i=nAe (ev/ml×tow)
v/i=R
where R = ml/nAe2tow
.... the graph between v and i is straight line

ohmic counductors
.... I think it will help you. ......

Answer 2

Ohm's law :- The potential difference across the ends of a resistor is directly proportional to the current through it, provided it's temperature remains the same.

The conditions for its validity is temperature and all other parameters should be constant.

The nature of the graph is a straight line passing through the origin.

Resistance is the physical quantity that can be determined from the graph.

V=IR

Voltage and current is always constant..

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