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JEE Main Physics Class 12 Moving Charges and Magnetism Part 2 Questions
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Question : 1
Total: 100
Given below are two statements :
Statements I : If the number of turns in the coil of a moving coil galvanometer is doubled then the current sensitivity becomes double.
Statements II : Increasing current sensitivity of a moving coil galvanometer by only increasing the number of turns in the coil will also increase its voltage sensitivity in the same ratio
In the light of the above statements, choose the correct answer from the options given below :
[10-Apr-2023 shift 1]
Both Statement I and Statement II are true
Both Statement I and Statement II are false
Statement I is true but Statement II is false
Statement I is false but Statement II is true
Validate
Solution:
I
=
k
θ
NBA
C
⋅
S
=
θ
I
=
NBA
K
N
→
2
N
C
⋅
S
→
2
CS
But V.S.
=
θ
V
=
NBA
KR
N
→
2
NC
⋅
S
→
2
CS
But V.S.
=
θ
v
=
θ
IR
=
NBA
RK
As
N
→
2
N
,
R
→
2
R
So V.S = constant
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