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प्रश्न
What did Faraday use to confirm that the room's interior remained charge-free?
विकल्प
A charged comb.
A Gaussian pillbox.
A metallic chain dragging on the ground.
An electroscope.
MCQ
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उत्तर
Faraday used an electroscope to confirm that the room's interior remained charge-free. Charge stayed concentrated on the foil surface.
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