Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
110 views
in Physics by (92.4k points)
closed by
Sensivitivity of a moving coil galvanometer can be increased by
A. decreasing the number of turns of coil
B. increasing the number of turns of coil
C. decreasing the area of a coil
D. by using a weak magnet

2 Answers

0 votes
by (90.5k points)
selected by
 
Best answer
Correct Answer - c
Sensitivity of a galvanometer is the deflection produce for a unit current flowing through it i.e
`(phi)/(I) =(NBA)/(C )`
To increase the sensitivity of a galvanometer we should
(i) increase the number of turns (N) of coil
(ii) increases the area of coil (A)
(iii) use a powerful magnet
0 votes
by (105 points)
correct answer option b
Explanation:
Sensitivity of a moving coil galvanometer is defined as the current i in microampere required to consume 1 millideflection.
∴ Sensitivity k= I/O = NBA/C
​ 
 
where all the symbols have their usual meaning and C is the torque per unit twist
Thus the sensitivity of the galvanometer can be increased either by increasing the number of turns (N), using strong magnet or increasing the area of the coil (A). 

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...