alleryYou keep the key pressed for a whole minute. During that minute the galvanometer shows:
AGrowing deflection
BSteady deflection
CRapid flicker
DNo deflection
Answer & Solution
Correct answer: D. No deflection
1. A held key gives a constant current.
2. Constant current means constant flux.
3. Constant flux induces nothing, so no deflection.
_Source: syllabus Physics Part I, Chapter 6, Electromagnetic Induction._
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