Consider two identical galvanometers and two identical resistors having resistance, . Which of the following is true? If the internal resistance of the galvanometers , which of the following statement(s) about any one of the galvanometers is(are) true?
The maximum voltage range is obtained when all the components are connected in series
Explanation for correct options(A) and option(B).
The explanation for option(A):
The range of voltmeter is given by the expression
V is maximum in this case.
Thus option(A) is correct.
Explanation for option(B):
The range of ammeter I is given by the expression.
Where,
Here ā is the minimum and therefore I is the maximum.
Thus option(b) is correct.
Explanation for incorrect options(C) and option(D).
Explanation for option(C):
The maximum current range is obtained when all the components are connected in parallel.
Thus option (c) is not the correct answer.
Explanation for option(D):
The maximum voltage range is obtained when all the components are connected in series.
Thus option (D) is not the correct answer.
Therefore the correct options are option(A) and option(B).