NEET | 2017Current Electricity and Electrical InstrumentHard
Question
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves :-
Options
A.
Potential gradients
B.
A condition of no current flow through the galvanometer
C.
A combination of cells, galvanometer and resistances
D.
Cells
Solution
In zero deflection condition, potentiometer draws no current.
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
The temperature coefficient of resistance of a wire is 0.00125 per degree celcius. At 300 K its resistance is 1 ohm. The...Five identical resistors each of resistance 1Ω are initially arranged as shown in the figure by clear lines. If two...A potentiometer wire of 10 m length and having a resistance of 1 ohm/m is connected to an accumulator of emf 2.2 volt an...A bulb is connected to an ideal battery of emf 10 V so that the resulting current is 10 mA. When the bulb is connected t...In the following circuit, the reading of the voltmeter will be :- (in volt)...