If an electric current is passed through a nerve of a man, then man
A
Begins to laugh
B
Begins to weep
C
Is excited
D
Becomes insensitive to pain
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C
Is excited
c (c) Human body, though has a large resistance of the order, of $K\Omega $(say $10\,K\Omega $), is very sensitive to minute currents even as low as a few $mA$. Electrons, excites and disorders the nervous system of the body and hence one fails to control the activity of the body.
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A resistance wire connected in the left gap of a meter bridge balances a $10\, \Omega$ resistance in the right gap at a point which divides the bridge wire in the ratio $3: 2 .$ If the length of the resistance wire is $1.5 m ,$ then the length of $1\, \Omega$ of the resistance wire is $....... \times 10^{-2}\;m$