Question

In the arrangement shown in figure there are two coils wound on a non-

conducting cylindrical rod. Initially the key is not inserted in the circuit. Later

the key is inserted and then removed shortly after.

What are the two observations that can be noted from the galvanometer

reading?​

Answer 1

$1 {}^{st} \: when \: key \: is \: inserted \: a \: momentary \:$

$deflection \: is \: seen \: in \: galvanometer$

$\pink{reason = when \: the \: key \: was \: }$

$\pink{inserted \: the \: flow \: of \: current \: }$

$\pink{changed \: from \: zero \: and \: change \: }$

$\pink{in \: magnetic \: field \: was \: seen \: that}$

$\pink{resulted \: in\: the \: generating \:of \: current}$

$\pink{in \: the \: other \: coil}$

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$2 {}^{rd} when \: the \: key \: is \: inserted \: and \: the$

$flow \: of \: current \: is \: continuous \: then$

$no \: deflection \: is \: seen \: in \: galvanometer$

$\pink{when \: the \: flow \: became \: continous}$

$\pink{there \: was \: no \: change \: in \: magnetic \: }$

$\pink{field \: so \: no \: current \: was \: produced}$

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$3 {}^{rd} when \: the \: key \: is \: removed \: a \:$

$momentary \: \: deflection \: is \: seen$

$\pink{reason = same \: as \: 1 {}^{st} }$

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$\green{write \: any \: two}$

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