PHYSICS IMPORTANT STATEMENTS FROM ELECTRICITY AND

MAGNETISM THAT HELPS IN ASSERTION AND REASNING.FOR OUR JEE.

                   1.When the length of conductor is doubled its resistance also gets doubled.resistance is directly proportional to length of conductor.

                    2.kirchoofs first law is conservation of charge.

                    3.the drift velocity of electrons in a metallic wire will decrease,if the temperature of wire is increased.

                    4.on increasing temp,conductivity of metallic wire decreases

                    5.Potential measured by a voltmetre across a wire is always less than the actual potential difference across it.

                    6.Direction of current is opposite to flow of electron.

                    7.Internal resistance of battery is drawn parallel to battery in electrical circuit.

                    8.A conductor is electrically neutral.

                    9.The field in a moving coil galvanometre in made radial.

                   10.in a series L.C.R. circuit at resonance power consumed by circuit is maximum.

                   11.in series L.R.circiut voltage LEADS current.

                   12. In series L.C circuit current LEADS voltage.

                   13.In alternating current direction of  motion of any electron will not change periodically.

                   14.Motion of electron is vendor with drift velocity.

                   15.Rate of heat generated when resistance is connected with A.c depends upon time.

                   16.Alternating current shows magnetic field.

                   17.electric field intensity with in conductor will be zero.

                   18.In series L.C.R. circuit  potential drop across inductive resistance will be same as capacitive resistance at resonsnce.

                   19. Electric field lines inside conductor is zero.

                    20.A charged particle moves perpendicularly to magnetic field . its K.E. will remain constant and momentum changes.

                   21.A beam of electron passes undeflected through electric and magnetic fiels.

                   22.A system cannot have mutual inductance with out having self inductance.

                  23.Varying magnetic field produces electric field which is non conservative.

                  24.Magnetic flux is scalar quantity.

                  25.Electric field generated  from time dependent magnetic field obeys lenz law.