Current Electricity and Electrical InstrumentHard
Question
In the standard post office box setup. Mark the INCORRECT statement :-
Options
A.the null point reading implies the position of jockey for which reading of galvanometer is zero.
B.the null point reading means consecutive readings at which the galvanometer deflects in the opposite direction.
C.the key connected to Galvanometer is switched on after switching on the key connected to battery.
D.the key connected to Galvanometer is switched off before switching off the key connected to battery.
Solution
In the standard PO experiment, reading are taken such that the galvanometer deflects in opposite direction. The key connected to galvanometer is switched on after the key of the battery so as to reduce the inductive effect in the circuit while taking the reading. The same is true while switching off the set-up. Note : Refer the PO Box experiment.
Create a free account to view solution
View Solution FreeTopic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
Let (x, y) be any point on the parabola y2 = 4x. Let P be the point that divides the line segment from (0, 0) to (x, y) ...In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of galvanometer is...A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E'...Assuming the diodes to be silicon with forward resistance zero, the current-I is the following circuit is :-...In a metre bridge experiment null point is obtained at 20 cm from one end of the wire when resistance X is balanced agai...