Statement -1 : The sensitvity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil. Statement - 2: Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.
A
Statement -1 is True, statement -2 is True , statement -2 is a correct explanation for statement -1.
B
Statement -1 is True, statement -2 is True , statement -2 is not a correct explanation for statement -1.
C
Statement -1 is True, statement -2 is False
D
Statement -1 is False, statement -2 is True
Text Solution
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The correct Answer is:
C
Statement - 1 is true . Sensitivity `= (theta)/(I) = (N B A)/( c )` . If `B` increases, `(theta)/(I)` increases. Statement - 2 is wrong because soft iron can be easily magnetised and demagnetized.
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