Why does a galvanometer show a momentary deflection at the time of charging or discharging a capacitor? Write the necessary expression to explain this observation.

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During the charging and discharging of the capacitor, the EM waves gets set up in the circuit in the form of displacement current.
ID=ε0dϕdtwhere ϕ is the electric flux.

Hope this information will clear you doubts about EM waves.
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  • 10
because a capacitor, with time gets fully charged and doesn't allow current to flow in the circuit.
  • -18
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