In a potentiometer experiment for measuring the emf of a cell, the null point is at 480 cm when we have a resistor in series with the cell and galvanometer. If the series resistances is reduced to half, the null point will be at

a)

120 cm

b)

240 cm

c)

480 cm

d)

600 cm

Question ID - 151650 :-

In a potentiometer experiment for measuring the emf of a cell, the null point is at 480 cm when we have a resistor in series with the cell and galvanometer. If the series resistances is reduced to half, the null point will be at

a)

120 cm

b)

240 cm

c)

480 cm

d)

600 cm

1 Answer

5876 Votes

3537

Answer Key : (c) -

(c)

At null point, no current flows through galvanometer. Therefore, the resistance connected in series with galvanometer, at null point position will be in effective. Thus, null point is obtained on potentiometer wire at the original position after the removal wire at the original position after the removal of series resistance from galvanometer

We hope we have given the updated helpful answer / content for your query in an easily accessible format to help you in preparing adequately.
We do offer free support materials, 11th maths guide 11th maths guide12th maths guide10th maths guide, also for all the classes books and guide to all the students who sign up for SaraNextGen. Apart from traditional textbook queries, we've got conjointly provided further high order level thinking issues, that are seemingly to be expected in boards and competitive exams. It includes conceptual queries, MCQs, Long and short answer type queries, etc. These Questions are designed to learn each student and academics by providing chapter-wise further issues focusing totally on testing conceptual information with applications.
Here, we've got provided a number of the necessary ways in which within which the solutions of all the Questions will profit students of class 1 to 12. If you have any queries,
drop a message to us and we will get back to you at the earliest.